Coordinates: 35°53′N 78°47′W / 35.88°N 78.79°W / 35.88; -78.79

A map of Research Triangle in North Carolina, highlighting the locations of North Carolina State University, Duke University, and University of North Carolina at Chapel Hill
A map of Research Triangle in North Carolina, highlighting the locations of North Carolina State University, Duke University, and University of North Carolina at Chapel Hill

The Research Triangle, or simply The Triangle, are both common nicknames for a metropolitan area in the Piedmont region of North Carolina in the United States, anchored by the cities of Raleigh and Durham and the town of Chapel Hill, home to three major research universities: North Carolina State University, Duke University, and University of North Carolina at Chapel Hill, respectively. The nine-county region, officially named the Raleigh–Durham–Cary combined statistical area (CSA), comprises the Raleigh–Cary and Durham–Chapel Hill Metropolitan Statistical Areas and the Henderson Micropolitan Statistical Area. The "Triangle" name originated in the 1950s with the creation of Research Triangle Park, located between the three anchor cities and home to numerous high tech companies.

In 2019, a U.S. Census estimate put the population at 2,079,687, making it the second largest combined statistical area in the state of North Carolina behind Charlotte CSA.[1] The Raleigh–Durham television market includes a broader 24-county area which includes Fayetteville, North Carolina, and has a population of 2,726,000 persons.[2]

Most of the Triangle is part of North Carolina's first, second, fourth, ninth, and thirteenth congressional districts.[3]

The region is sometimes confused with The Triad, which is a North Carolina region adjacent to and directly west of the Triangle comprising Greensboro, Winston-Salem, and High Point, among other cities.


Depending on which definition of the Research Triangle region is used, as few as three or as many as 16 counties are included as part of the region. All of these counties when included hold a population of over 2,167,000 people.

The three core counties of Wake, Durham and Orange are the homes of the three research universities for which the area is named.

The 2020 members of the Research Triangle Regional Partnership are:[4]

NC Regional Councils of Governments Definition

All counties in the State of North Carolina are in one of 16 regional councils which provide programs and services to local governments. The Triangle J Council of Governments includes Chatham, Durham, Johnston, Lee, Moore, Orange, and Wake Counties.[5] The northern Triangle counties of Person, Granville, Franklin, Vance and Warren are part of the Kerr-Tar Regional Council of Governments.

Office of Management and Budget Definition

Location of the Raleigh–Durham–Cary CSA and its components: .mw-parser-output .legend{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .legend-color{display:inline-block;min-width:1.25em;height:1.25em;line-height:1.25;margin:1px 0;text-align:center;border:1px solid black;background-color:transparent;color:black}.mw-parser-output .legend-text{}  Durham–Chapel Hill Metropolitan Statistical Area   Raleigh-Cary Metropolitan Statistical Area   Henderson Micropolitan Statistical Area
Location of the Raleigh–Durham–Cary CSA and its components:
  Durham–Chapel Hill Metropolitan Statistical Area
  Raleigh-Cary Metropolitan Statistical Area
  Henderson Micropolitan Statistical Area

As of September 14, 2018, the US Office of Management and Budget (OMB) delineated the Raleigh-Durham-Cary Combined Statistical Area as consisting of two metropolitan and one micropolitan statistical areas.[6] Those three statistical areas in turn are defined as consisting of a total of nine counties. The MSAs and their constituent counties are:

Prior to September 2018, the OMB had used the name Raleigh-Durham-Chapel Hill Combined Statistical Area and it included several additional counties.[7] The Dunn Micropolitan Statistical Area (Harnett County) and Sanford Micropolitan Statistical Area (Lee County) were moved to the Fayetteville-Sanford-Lumberton Combined Statistical Area, while the Oxford Micropolitan Statistical Area (Granville County) was folded into the Durham-Chapel Hill Metropolitan Statistical Area. The Raleigh Metropolitan Statistical Area was also renamed the Raleigh-Cary Metropolitan Statistical Area.

The table below outlines the populations of the constituent counties of the Raleigh–Durham-Cary Combined Statistical Area as of the 2020 Census.[8]

Historical population
County 2021 Estimate 2020 Census Change
Wake County 1,150,204 1,129,410 +1.84%
Durham County 326,126 324,833 +0.40%
Johnston County 226,504 215,999 +4.86%
Orange County 148,884 148,696 +0.13%
Chatham County 77,889 76,285 +2.10%
Franklin County 71,703 68,573 +4.56%
Granville County 61,986 60,992 +1.63%
Vance County 42,185 42,578 −0.92%
Person County 39,127 39,097 +0.08%
Total 2,144,608 2,106,463 +1.81%


Raleigh, the capital of North Carolina.
Raleigh, the capital of North Carolina.
Downtown Durham, North Carolina.
Downtown Durham, North Carolina.

The Triangle region, as defined for statistical purposes as the Raleigh–Durham–Cary CSA, comprises nine counties, although the U.S. Census Bureau divided the region into two metropolitan statistical areas and one micropolitan area in 2003. The Raleigh-Cary metropolitan area comprises Wake, Franklin, and Johnston Counties; the Durham-Chapel Hill metropolitan area comprises Durham, Orange, Chatham, Granville, and Person Counties; and the Henderson micropolitan area comprises Vance County.

Some area television stations define the region as Raleigh–Durham–Fayetteville. Fayetteville is more than 50 miles (80 km) from Raleigh, but is part of the Triangle television market.

15 largest municipalities

Rank City / town County 2020 Census 2010 Census Change
1 Raleigh Wake County / Durham County 467,665 403,892 +15.79%
2 Durham Durham County / Wake County 283,506 228,330 +24.17%
3 Cary Wake County / Chatham County 174,721 135,234 +29.20%
4 Chapel Hill Orange County / Durham County / Chatham County 61,960 57,233 +8.26%
5 Apex Wake County 58,780 37,476 +56.85%
6 Wake Forest Wake County / Franklin County 47,601 30,117 +58.05%
7 Holly Springs Wake County 41,239 24,661 +67.22%
8 Fuquay-Varina Wake County 34,152 17,937 +90.40%
9 Garner Wake County 31,159 25,745 +21.03%
10 Morrisville Wake County / Durham County 29,630 18,576 +59.51%
11 Clayton Johnston County / Wake County 26,307 16,116 +63.24%
12 Carrboro Orange County 21,295 19,582 +8.75%
13 Knightdale Wake County 19,632 11,401 +72.20%
14 Mebane Alamance County / Orange County 17,797 11,393 +56.21%
15 Henderson Vance County 15,060 15,368 −2.00%


Public secondary education in the Triangle is similar to that of the majority of the state of North Carolina, in which there are county-wide school systems (the exception is Chapel Hill-Carrboro City Schools within Orange County but apart from Orange County Schools). Based in Cary, the Wake County Public School System, which includes the cities of Raleigh and Cary, is the largest school system in the state of North Carolina and the 15th-largest in the United States, with average daily enrollment of 159,949 as of the second month of the 2016–17 school year.[10] Other larger systems in the region include Durham Public Schools (about 33,000 students) and rapidly growing Johnston County Schools (about 31,000 students).

Institutions of higher education

Duke Chapel at Duke University
Old Well at the University of North Carolina at Chapel Hill
Memorial Bell Tower at NC State


College sports

With the significant number of universities and colleges in the area and the relative absence of major league professional sports, NCAA sports are very popular, particularly those sports in which the Atlantic Coast Conference participates, most notably basketball.

The Duke Blue Devils (representing Duke University in Durham), NC State Wolfpack (representing North Carolina State University in Raleigh), and North Carolina Tar Heels (representing the University of North Carolina at Chapel Hill) are all members of the ACC. Rivalries among these schools are very strong, fueled by proximity to each other, with annual competitions in every sport. Adding to the rivalries is the large number of graduates the high schools in the region send to each of the local universities. It is very common for students at one university to know many students attending the other local universities, which increases the opportunities for "bragging" among the schools. The four ACC schools in the state, Duke, North Carolina, North Carolina State, and Wake Forest University (the last of which was originally located in the town of Wake Forest before moving to Winston-Salem in 1956), are referred to as Tobacco Road by sportscasters, particularly in basketball. All four teams consistently produce high-caliber teams[opinion]. Each of the Triangle-based universities listed has won at least two NCAA Basketball national championships.

Three historically black colleges, including recent Division I arrival North Carolina Central University and Division II members St. Augustine College and Shaw University also boost the popularity of college sports in the region.

Other colleges in the Triangle that field intercollegiate teams include Campbell University, Meredith College, and William Peace University.

The Triangle will host the World University Summer Games in 2029.

Professional sports

2006 Stanley Cup ceremony at the RBC Center (now PNC Arena)
2006 Stanley Cup ceremony at the RBC Center (now PNC Arena)

The region has only one professional team of the four major sports, the Carolina Hurricanes of the NHL, based in Raleigh. Since moving to the Research Triangle region from Hartford, Connecticut, they have enjoyed great success, including winning a Stanley Cup. With only one top-level professional sports option, minor league sports are quite popular in the region. The Durham Bulls in downtown Durham are a AAA Minor League baseball affiliate of the Tampa Bay Rays, and the Carolina Mudcats, based in Zebulon, 10 miles east of Raleigh, are the Advanced-A affiliate of the Milwaukee Brewers. In Cary, North Carolina FC plays in the second-level United Soccer League, and the North Carolina Courage began play in the National Women's Soccer League in 2017 after the owner of North Carolina FC bought the NWSL franchise rights of the Western New York Flash and relocated the NWSL franchise to the Triangle.

Team League Sport Venue (capacity)
Carolina Hurricanes NHL Hockey PNC Arena (18,680)
Durham Bulls IL (AAA) Baseball DBAP (10,000)
Carolina Mudcats CL (A) Baseball Five County Stadium (6,500)
North Carolina Courage NWSL (D1) Soccer WakeMed Soccer Park (10,000)
North Carolina FC USLC (D2) Soccer WakeMed Soccer Park (10,000)
Carolina Flyers AUDL Ultimate WakeMed Soccer Park (10,000) / Cardinal Gibbons High School

The area also had a team in the fledgling World League of American Football – however, the Raleigh–Durham Skyhawks, coached by Roman Gabriel, did not exactly cover themselves in glory; they lost all 10 games of their inaugural (and only) season in 1991. The team folded after that, being replaced in the league by the Ohio Glory, which fared little better at 1–9, ultimately suffering the same fate – along with the other six teams based in North America – when the league took a two-year hiatus, returning as a six-team all-European league in 1995.


IBM Research Triangle Park facility, pictured around 1982
IBM Research Triangle Park facility, pictured around 1982

The region's growing high-technology community includes such companies as IBM, Lenovo, SAS Institute, Cisco Systems, NetApp, Red Hat, EMC Corporation, and Credit Suisse First Boston. In addition to high-tech, the region is consistently ranked in the top three in the U.S. with concentration in life science companies. Some of these companies include GlaxoSmithKline, Biogen Idec, BASF, Merck & Co., Novo Nordisk, Novozymes, and Pfizer. Research Triangle Park and North Carolina State University's Centennial Campus in Raleigh support innovation through R&D and technology transfer among the region's companies and research universities (including Duke University and the University of North Carolina at Chapel Hill).

The area fared relatively well during the late-2000s recession, ranked as the strongest region in North Carolina by the Brookings Institution and among the top 40 in the country. The change in unemployment during 2008 to 2009 was 4.6% and home prices was 2%. The Greensboro metropolitan area was listed among the second-weakest and the Charlotte area among the middle in the country.[11]

Major employers

Major hospitals, medical centers and medical schools

North Carolina Memorial and Children's hospitals in Chapel Hill
North Carolina Memorial and Children's hospitals in Chapel Hill
Durham VA Medical Center in Durham
Durham VA Medical Center in Durham

The Research Triangle region is served by these hospitals and medical centers:[12]


Freeways and primary designated routes

The Durham Freeway
The Durham Freeway

The Triangle proper is served by three major interstate highways: I-40, I-85, and I-87 along with their spurs: I-440 and I-540, and seven U.S. Routes: 1, 15, 64, 70, 264, 401, and 501. US Highways 15 and 501 are multiplexed through much of the region as US 15-501. I-95 passes 30 miles east of Raleigh through Johnston County, with I-87 connecting I-95 at Rocky Mount, NC to Raleigh via the US 64–264 Bypass.

The two interstates diverge from one another in Orange County, with I-85 heading northeast through northern Durham County toward Virginia, while I-40 travels southeast through southern Durham, through the center of the region, and serves as the primary freeway through Raleigh. The related loop freeways I-440 and I-540 are primarily located in Wake County around Raleigh. I-440 begins at the interchange of US 1 and I-40 southwest of downtown Raleigh and arcs as a multiplex with US 1 northward around downtown with the formal designation as the Cliff Benson/Raleigh Beltline (cosigned with US 1 on three-fourths of its northern route) and ends at its junction with I-40 in southeast Raleigh. I-540, sometimes known as the Raleigh Outer Loop, extends from the US 64–264 Bypass to I-40 just inside Durham County, where it continues across the interstate as a state route (NC 540), prior to its becoming a toll road from the NC 54 interchange to the current terminus at NC Highway 55 near Holly Springs. I-95 serves the extreme eastern edge of the region, crossing north–south through suburban Johnston County.

U.S. Routes 1, 15, and 64 primarily serve the region as limited-access freeways or multilane highways with access roads. US 1 enters the region from the southwest as the Claude E. Pope Memorial Highway and travels through suburban Apex where it merges with US 64 and continues northeast through Cary. The two highways are codesignated for about 2 miles (3.2 km) until US 1 joins I-440 and US 64 with I-40 along the Raleigh–Cary border. Capital Boulevard, which is designated US 1 for half of its route and US 401 the other is not a limited-access freeway, although it is a major thoroughfare through northeast Raleigh and into the northern downtown area.

North Carolina Highway 147 is a limited-access freeway that connects I-85 with Toll Route NC 540 in northwestern Wake County. The older, toll-free portion of the four-lane route—known as the Durham Freeway or the I.L. "Buck" Dean Expressway—traverses downtown Durham and extends through Research Triangle Park to I-40. The Durham Freeway is often used as a detour or alternate route for I-40 through southwestern Durham the Chapel Hill area in cases of traffic accident, congestion or road construction delays. The tolled portion of NC 147, called the Triangle Expressway—North Carolina's first modern toll road when it opened to traffic in late 2011—continues past I-40 to Toll NC 540. Both Toll NC 147 and Toll NC 540 are modern facilities which collect tolls using transponders and license plate photo-capture technology.

Public transit

Triangle Transit bus
Triangle Transit bus
Chapel Hill Transit bus
Chapel Hill Transit bus

A partnering system of multiple public transportation agencies currently serves the Triangle region under the joint GoTransit branding. Raleigh is served by GoRaleigh (formerly Capital Area Transit) municipal transit system, while Durham has GoDurham (formerly the Durham Area Transit Authority). Chapel Hill is served by Chapel Hill Transit, and Cary is served by GoCary (formerly C-Tran) public transit systems. However, GoTriangle, formerly called Triangle Transit, works in cooperation with all area transit systems by offering transfers between its own routes and those of the other systems. Triangle Transit also coordinates an extensive vanpool and rideshare program that serves the region's larger employers and commute destinations.

Plans have been made to merge all of the area's municipal systems into Triangle Transit, and Triangle Transit also has proposed a regional rail system to connect downtown Durham, downtown Cary and downtown Raleigh with multiple suburban stops, as well as stops in the Research Triangle Park area. The agency's initial proposal was effectively cancelled in 2006, however, when the agency could not procure adequate federal funding. A committee of local business, transportation and government leaders currently are working with Triangle Transit to develop a new transit blueprint for the region, with various modes of rail transit, as well as bus rapid transit, open as options for consideration.[13]


Raleigh–Durham International Airport (RDU)

Main article: Raleigh–Durham International Airport


RDU welcome sign
RDU welcome sign
American Airlines Boeing 777 touches down at RDU
American Airlines Boeing 777 touches down at RDU
Southwest Airlines jet landing at RDU
Southwest Airlines jet landing at RDU

Raleigh–Durham International Airport (RDU) has nonstop passenger service to 68 destinations with over 450 average daily departures, including nonstop international service to Canada, Europe, and Mexico.[14] It is located near the geographic center of The Triangle, 4+12 miles (7.2 km) northeast of the town of Morrisville in Wake County. The airport covers 5,000 acres (2,023 ha) and has three runways.[15]

In 1939 the General Assembly of North Carolina chartered the Raleigh–Durham Aeronautical Authority, which was changed in 1945 to the Raleigh–Durham Airport Authority. The first new terminal opened in 1955. Terminal A (now Terminal 1) opened in 1981. American Airlines began service to RDU in 1985.

RDU opened the 10,000-foot (3,000 m) runway, 5L-23R, in 1986. American Airlines opened its north–south hub operation at RDU in the new Terminal C in June 1987, greatly increasing the size of RDU's operations with a new terminal including a new apron and runway. American brought RDU its first international flights to Bermuda, Cancun, Paris and London.

In 1996, American Airlines ceased its hub operations at RDU due to Pan Am and Eastern Airlines. Pan Am and Eastern were Miami's main tenants until 1991, when both carriers went bankrupt. Their hubs at MIA were taken over by United Airlines and American Airlines. This created a difficulty in competing with US Airways' hub in Charlotte and Delta Air Lines' hub in Atlanta, Georgia for passengers traveling between smaller cities in the North and South. Midway Airlines entered the market, starting service in 1995 with the then somewhat novel concept of 50-seat Canadair Regional Jets providing service from its RDU hub primarily along the East Coast. Midway, originally incorporated in Chicago, had some success after moving its operations to the midpoint of the eastern United States at RDU and its headquarters to Morrisville, NC. The carrier ultimately could not overcome three weighty challenges: the arrival of Southwest Airlines, the refusal of American Airlines to renew the frequent flyer affiliation it had with Midway (thus dispatching numerous higher fare-paying businesspeople to airlines with better reward destinations), and the significant blow of September 11, 2001. Midway Airlines filed Chapter 11 bankruptcy on August 13, 2001, and ceased operations entirely on October 30, 2003.

In February 2000, RDU was ranked as the nation's second fastest-growing major airport in the United States, by Airports Council International, based on 1999 statistics. Passenger growth hit 24% over the previous year, ranking RDU second only to Washington Dulles International Airport. RDU opened Terminal A south concourse for use by Northwest and Continental Airlines in 2001. The addition added 46,000 square feet (4,300 m2) and five aircraft gates to the terminal. Terminal A became designated as Terminal 1 on October 26, 2008. In 2003, RDU also dedicated a new general aviation terminal. RDU continues to keep pace with its growth by redeveloping Terminal C into a new state-of-the-art terminal, now known as Terminal 2, which opened in October 2008.[16]

As of June 2022, the airport will have international flights to Cancun, London, Montreal, Paris, Reykjavik and Toronto. Cancun service is provided by American, Frontier and JetBlue, while the Canada flights are provided by Air Canada, Paris by Delta, Reykjavik by new to the market Icelandair, and London by American. Icelandair is the first international carrier outside of Air Canada to service the airport. Delta Air Lines currently considers the airport to be a "focus city", or an airport that is not a hub, but is of importance to the carrier. The COVID-19 pandemic significantly shrunk the operation, but by September 2022, Delta will be serving 21 destinations on aircraft ranging from the CRJ700 to the 767.

Public general-aviation airports

In addition to RDU, several smaller publicly owned general-aviation airports also operate in the metropolitan region:

Private airfields

Several licensed private general-aviation and agricultural airfields are located in the region's suburban areas and nearby rural communities:

Lake Ridge Airport (8NC8) in Durham
Lake Ridge Airport (8NC8) in Durham


These licensed heliports serve the Research Triangle region:

NC92 helipad at Duke University Medical Center

A number of helipads (i.e. marked landing sites not classified under the FAA LID system) also serve a variety of additional medical facilities (such as UNC Hospitals in Chapel Hill), as well as private, corporate and governmental interests, throughout the region.


Amtrak serves the region with the Silver Meteor, Silver Star, Palmetto, Carolinian, and Piedmont routes.

Station\Route Silver Meteor Silver Star Palmetto Carolinian Piedmont
Selma (SSM) X X
Fayetteville (FAY) X X
Southern Pines (SOP) X
Raleigh (RGH) X X X
Cary (CYN) X X X
Durham (DNC) X X


Notable shopping centers and malls:

Northgate Mall in Durham
Northgate Mall in Durham

Super-regional enclosed malls

Major shopping centers


Film festivals and events:

Notable performing arts and music venues:

Theatre and dance events:

Music festivals:

Movie theatres:


Greater Raleigh metropolitan area, North Carolina museums
Museum name Image City Type Notes
Ackland Art Museum
Ackland Art Museum.jpg
Chapel Hill Art
Artspace Raleigh Art
Ayr Mount
Ayr Mount, Saint Mary
Hillsborough History
Bennett Place State Historic Site Durham History
Carolina Basketball Museum Chapel Hill Sports
Carolina Tiger Rescue Pittsboro Science
Contemporary Art Museum of Raleigh
Contemporary Art Museum, Raleigh.jpg
Raleigh Art
Duke Homestead Durham History
Joel Lane Museum House Raleigh History
Kidzu Children's Museum Chapel Hill Children
Legends of Harley Drag Racing Museum Raleigh Sports
Marbles Kids Museum
Raleigh Children formerly Exploris
Meredith College Galleries Raleigh Art
Mordecai Mansion
Historic Mordecai House-Raleigh-NC-13 Sept 2010.jpeg
Raleigh History
Morehead Planetarium and Science Center
Chapel Hill Science home to astronaut training for years
Museum of Life and Science Durham Science includes small outdoor zoo
North Carolina Museum of Art
West Building Entrance Canopy.jpg
Raleigh Art expanded in 2010
North Carolina Museum of History
Raleigh History also home to North Carolina Sports Hall of Fame
North Carolina Museum of Natural Science
Raleigh Science annual BugFest and Astronomy Days
Raleigh City Museum Raleigh History
North Carolina State Capitol
North Carolina State Capitol, Raleigh.jpg
Raleigh History
North Carolina State University Insect Museum Raleigh Science
Nasher Museum of Art
Durham Art
NCCU Art Museum Raleigh Art
Page-Walker Arts & History Center Cary History


The area is part of the Raleigh–Durham–Fayetteville television designated media area and is the 25th-largest in the country with 1,135,920 households (2014) included in that area and the second largest television market in North Carolina.[17] It is part of the Raleigh–Durham Nielsen Audio radio market (code 115) and is the 42nd-largest in the country with a population of 1,365,900.[18]

The Raleigh–Durham–Fayetteville market is defined by Nielsen as including Chatham, Cumberland, Dunn, Durham, Granville, Halifax, Harnett, Hoke, Johnston, Lee, Moore, Northampton, Orange, Robeson, Vance, Wake, Warren, Wayne, and Wilson Counties, along with parts of Franklin County.[19]


Numerous newspapers and periodicals serve the Triangle market.


Online only



The Triangle is part of the Raleigh–Durham–Fayetteville Designated Market Area for broadcast television. As of 2015–16, the area was the 25th-largest in the country. This area includes these television stations:


Raleigh is home to the Research Triangle Region bureau of the regional cable TV news channel Spectrum News 1 North Carolina.


The Triangle is home to North Carolina Public Radio, a public radio station/NPR provider that brings in listeners around the country. Raleigh and a large part of the Triangle area is Arbitron radio market #43. Stations include:

Map of the Triangle

A map of the Triangle from 2007.
A map of the Triangle from 2007.
Primary cities and towns

A – Raleigh
B – Durham
C – Chapel Hill
D – Cary
E – Morrisville
F – Apex
G – Holly Springs
H – Fuquay-Varina
I – Garner
J – Knightdale
K – Wendell
L – Zebulon
M – Rolesville
N – Wake Forest
O – Hillsborough
P – Carrboro
Q – Pittsboro
R – Clayton
S – Youngsville
T – Franklinton
U – Creedmoor
V – Stem
W – Butner


1 – Wake County
2 – Durham County
3 – Orange County
4 – Chatham County
5 – Harnett County
6 – Johnston County
7 – Franklin County
8 – Granville County

Parks and bodies of water

aResearch Triangle Park
bUmstead State Park
cJordan Lake
dHaw River
eHarris Lake
f – Lake Wheeler
g – Lake Benson
hFalls Lake

Interstate highways

1 – I-40/I-85
2 – I-85
3 – I-40
4 – I-440
5 – I-540
13 – I-87

Other major highways

1US 15
2US 1
3US 401
4US 64
5US 70
6US 401
7US 1
8US 15-501
9US 64
10US 70
11US 501
12NC 147
13US 64–264
14US 64 Business

See also


  1. ^ "Metropolitan and Micropolitan Statistical Areas Population Totals: 2010–2019". U.S. Census Bureau. Retrieved 2020-03-29.
  2. ^ Nielsen Station Index, Viewers in Profile, Raleigh–Durham (Fayetteville), NC May 2010
  3. ^ Rakich, Ryan Best, Aaron Bycoffe and Nathaniel (2021-08-09). "What Redistricting Looks Like In Every State - North Carolina". FiveThirtyEight. Retrieved 2022-05-23.
  4. ^ "Counties - Research Triangle Regional Partnership". Retrieved 2020-08-24.
  5. ^ "NC Regional Councils Map". NC Association of Regional Councils of Government. Retrieved 2019-06-24.
  6. ^ OMB Bulletin No. 18-04 (PDF) (Report). Office of Management and Budget. September 14, 2018. p. 142. Retrieved 2020-02-06.
  7. ^ OMB Bulletin No. 18-03 (PDF) (Report). Office of Management and Budget. April 10, 2018. p. 141. Retrieved 2020-02-06.
  8. ^ "County Population Totals and Components of Change: 2010-2020". United States Census Bureau. Retrieved 2021-05-25.
  9. ^ "Raleigh-Durham-Cary, NC CSA". Retrieved June 22, 2022.
  10. ^ "District Facts / Overview".
  11. ^ Snipes, Cameron (June 17, 2009). "Brookings report ranks Raleigh–Cary strongest metro in N.C." Triangle Business Journal. Retrieved 2009-06-23.
  12. ^ "North Carolina Hospitals and Medical Centers". The Agape Center. Retrieved 2008-05-30.
  13. ^ "Regional Transit Needs: Next Steps". TTA Web Site. Retrieved 2007-07-04.
  14. ^ "Nonstop Destinations Raleigh–Durham International Airport". Retrieved 19 October 2017.
  15. ^ FAA Airport Form 5010 for RDU PDF, effective February 1, 2018.
  16. ^ "Raleigh–Durham International Airport".
  17. ^ "Local Television Market Universe Estimates" (PDF).
  18. ^ "Spring 2011 Market Survey Schedule & Population Ranking". Arbitron.
  19. ^ "Raleigh–Durham DMA". Time Warner. Archived from the original on 2011-10-17.