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City of Oakley
Oakley City Hall
Oakley City Hall
Flag of City of Oakley
Official logo of City of Oakley
Location in Contra Costa County and the state of California
Location in Contra Costa County and the state of California
City of Oakley is located in the United States
City of Oakley
City of Oakley
Location in the United States
Coordinates: 37°59′51″N 121°42′45″W / 37.99750°N 121.71250°W / 37.99750; -121.71250
Country United States
State California
CountyContra Costa
IncorporatedJuly 1, 1999[1]
 • MayorAaron Meadows[2]
 • State SenatorSteve Glazer (D)[3]
 • State AssemblyLori Wilson (D)[4]
 • U. S. CongressMark DeSaulnier (D)[5]
 • Total16.17 sq mi (41.88 km2)
 • Land15.86 sq mi (41.09 km2)
 • Water0.30 sq mi (0.79 km2)  1.87%
20 ft (6 m)
 • Total43,357
 • Density2,700/sq mi (1,000/km2)
Time zoneUTC-8 (PST)
 • Summer (DST)UTC-7 (PDT)
ZIP code
Area code925
FIPS code06-53070
GNIS feature IDs277567, 2411294

Oakley is a city in Contra Costa County, California, United States. It is within the nine-county San Francisco Bay Area. The population at the 2020 United States census was 43,357. Oakley was incorporated in 1999, making it the newest incorporated city in Contra Costa County.


The name "oak" comes from the abundance of oak trees, while the suffix "-ley" comes from the Old English word for "field" or "meadow". The name Oakley is of Old English origin and its meaning is "meadow of oak trees". This aptly describes the area when first settled and to some extent even today. However, if not for the flip of a coin and cribbage board the community may have been named Dewey. City founder Randolph Marsh wanted to name the city Dewey, after Admiral Dewey, in honor of Dewey's success at Battle of Manila Bay during the Spanish–American War. His friend J.T. Whightman preferred the name "Oakley" because the terrain was largely meadows and oaks. To determine which name would prevail they battled it out over a game of cribbage. Marsh may have lost the game and the right to name the city but he ensured his immortality by choosing downtown street names whose first initials spelled "Marsh" — Main, Acme, Ruby, Star and Home.


Don José Noriega, a wealthy Californio ranchero, was granted Rancho Los Méganos in 1835, covering all of modern Oakley.

Indigenous history

Archeologists have found prehistoric sites in the Oakley area. One substantial shell mound was discovered early in the 20th century near what is now the eastern edge of town. The Northwest Information Center of the California Historical Resources Information System monitors the archeological investigations undertaken in Oakley. Around three dozen such projects have been completed in the past 25 years, yielding only four prehistoric sites in the city. However, the information center believes there is a high possibility that other prehistoric sites remain within the city. To enable further archaeological excavation, the site referred to as Simon Mound was purchased by the Archaeological Conservancy after many of the ancient settlement places had already been destroyed by urban encroachment. Simone Mound has provided bones and fragments from burial sites starting around 1000 A.D. and is near a similar Conservancy preserve, the Hotchkiss Mound.[9]

The first accounts of identifiable cultural community in the west delta are attributed to the Bay Miwoks, who occupied the region between 1100 and 1770 AD. The Bay Miwok people, usually called the Julpunes or Pulpunes by European explorers, were organized into "tribelets"—political units that included several fairly permanent villages and a set of seasonal campsites arrayed across a well-defined territory.

Spanish exploration

Incursions of the Spanish Empire into the Oakley area began in the 1770s. The first group to enter the present-day city limits was the De Anza expedition of 1775–76. However, after a failed attempt to find a route through the tule swamps to the Sierra, the De Anza expedition returned to Monterey. Subsequent expeditions by the Spanish did not result in colonization. Europeans settled in the Delta in the 19th century, but were killed by malaria and smallpox.[citation needed]

American period

Oakley's first post office was established in 1898.[10]

Oakley became an incorporated city in 1999.[11]

Geography and environment

According to reports provided by,[12] Oakley experiences 21.16 inches (537 mm) of annual rainfall with an average high temperature in July of 96.0 °F (35.6 °C) and an average low temperature in January of 40.0 °F (4.4 °C). Oakley experiences 52% clear days throughout the year.

Oakley's western border is California State Route 160. The City of Antioch adjoins Oakley on the west, the city of Brentwood adjoins Oakley on the south, and Bethel Island lies to the east. The Sacramento-San Joaquin Delta forms the northern boundary. The southwestern skyline is dominated by Mt. Diablo.


The City of Oakley is a general-law city, as opposed to a charter city, formed under state legislative statutes and governed by a body of laws in the state Constitution. Oakley operates under a council-manager form of government.[citation needed]

The Oakley City Council consists of five non-partisan council members elected "at large". Oakley's city council members are considered part-time because, aside from being council members, they have full-time jobs. This part-time nature of the council opens up opportunities for ordinary citizens who are working in the private sector to participate.[citation needed]

At the first council meeting in December, the mayor is selected by a majority of the city council from among currently serving council members. At this time a vice mayor is also selected.


In 2017, Oakley had 19,906 registered voters with 9,921 (49.8%) registered as Democrats, 4,705 (23.6%) registered as Republicans, and 4,371 (22%) decline to state voters.[13] Records show that 662 Oakley voters are registered Independents, with an additional 55 registered Green Party members.[14]


Oakley has had vineyards since the late 1800s. Early Portuguese and Italian immigrants found the climate amenable and planted thousands of acres of vineyards.

Nearly 80 percent of Oakley's roughly 700 acres (2.8 km2) of vineyards are planted in Zinfandel. Oakley's grape harvest can conservatively be estimated at about 2,000 tons. These grapes are distributed to a number of local wineries.[citation needed]


The BNSF Railway runs through town from east to west. This line also carries Amtrak California's San Joaquin service. In March of 2023 the decision was made to close the Amtrak Antioch–Pittsburg station and replace it with Oakley Station.

California State Route 4 used to run right through town from Antioch to Brentwood on Main Street. From 2000 to 2008 a Bypass was constructed from California State Route 160 to Marsh Creek Road south of Brentwood to extend the freeway from Antioch. Oakley relinquished Hwy 4 through downtown to the state in 2012, and is now connected through the Laurel Rd exit. [15]

Oakley is part of the East Contra Costa Bicycle Plan, which has existing facilities in Oakley as well as plans for further expansion.[16]

Fire services

The East Contra Costa Fire Protection District (ECCFPD) was formed in 2002 when the Contra Costa County Board of Supervisors consolidated the East Diablo Fire District, Oakley-Knightsen Fire District and Bethel Island Fire District. ECCFPD serves the cities of Brentwood and Oakley, as well as the unincorporated areas of Bethel Island, Byron, Discovery Bay, Knightsen, and Marsh Creek-Morgan Territory.

After lengthy negotiations between the County and the cities of Oakley and Brentwood governance of the ECCFPD was turned over to a new governing board in February 2010.


Historical population
U.S. Decennial Census[17]


The 2010 United States Census[18] reported that Oakley had a population of 35,432. The population density was 2,193.2 inhabitants per square mile (846.8/km2). The racial makeup of Oakley was 22,641 (63.9%) White, 2,582 (7.3%) African American, 314 (0.9%) Native American, 2,236 (6.3%) Asian, 142 (0.4%) Pacific Islander, 4,998 (14.1%) from other races, and 2,519 (7.1%) from two or more races. There were 12,364 people (34.9%) of Hispanic or Latino ancestry, of any race.

The Census reported that 35,329 people (99.7% of the population) lived in households, 75 (0.2%) lived in non-institutionalized group quarters, and 28 (0.1%) were institutionalized.

There were 10,727 households, out of which 5,479 (51.1%) had children under the age of 18 living in them, 6,531 (60.9%) were opposite-sex married couples living together, 1,412 (13.2%) had a female householder with no husband present, 708 (6.6%) had a male householder with no wife present. There were 747 (7.0%) unmarried opposite-sex partnerships, and 93 (0.9%) same-sex married couples or partnerships. 1,522 households (14.2%) were made up of individuals, and 515 (4.8%) had someone living alone who was 65 years of age or older. The average household size was 3.29. There were 8,651 families (80.6% of all households); the average family size was 3.62.

The population was spread out, with 10,808 people (30.5%) under the age of 18, 3,531 people (10.0%) aged 18 to 24, 10,149 people (28.6%) aged 25 to 44, 8,553 people (24.1%) aged 45 to 64, and 2,391 people (6.7%) who were 65 years of age or older. The median age was 32.0 years. For every 100 females, there were 98.8 males. For every 100 females age 18 and over, there were 96.9 males.

There were 11,484 housing units at an average density of 710.8 per square mile (274.4/km2), of which 10,727 were occupied, of which 8,163 (76.1%) were owner-occupied, and 2,564 (23.9%) were occupied by renters. The homeowner vacancy rate was 3.4%; the rental vacancy rate was 5.5%. 26,778 people (75.6% of the population) lived in owner-occupied housing units and 8,551 people (24.1%) lived in rental housing units.


As of the census[19] of 2000, there were 25,619 people, 7,832 households, and 6,461 families residing in the city. The population density was 796.4/km2 (2,063.2/mi2). There were 7,946 housing units at an average density of 247.0/km2 (639.9/mi2). The racial makeup of the city was 75.50% White, 3.42% Black or African American, 0.89% Native American, 2.86% Asian, 0.29% Pacific Islander, 10.58% from other races, and 6.46% from two or more races. 24.98% of the population were Hispanic or Latino of any race.

There were 7,832 households, out of which 52.0% had children under the age of 18 living with them, 68.2% were married couples living together, 9.1% had a female householder with no husband present, and 17.5% were non-families. 13.0% of all households were made up of individuals, and 4.1% had someone living alone who was 65 years of age or older. The average household size was 3.26 and the average family size was 3.56.

In the city, the population was spread out, with 34.5% under the age of 18, 7.6% from 18 to 24, 34.5% from 25 to 44, 18.0% from 45 to 64, and 5.4% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 102.1 males. For every 100 females age 18 and over, there were 100.4 males.

The median income for a household in the city was $65,589, and the median income for a family was $68,888. Males had a median income of $49,883 versus $34,659 for females. The per capita income for the city was $21,895. 5.0% of the population and 2.8% of families were below the poverty line. Out of the total population, 4.7% of those under the age of 18 and 7.4% of those 65 and older were living below the poverty line.


The city is mainly served by the Oakley Union Elementary School District (K–8) and the Liberty Union High School District.

Elementary schools

Middle schools

High schools

Public libraries

The Oakley branch of the Contra Costa County Library system is located in Oakley.[20]

Notable people


  1. ^ "California Cities by Incorporation Date". California Association of Local Agency Formation Commissions. Archived from the original (Word) on February 21, 2013. Retrieved March 24, 2013.
  2. ^ "City Council". City of Oakley. Archived from the original on May 6, 2023. Retrieved May 6, 2023.
  3. ^ "Senators". State of California. Retrieved March 23, 2013.
  4. ^ "Members Assembly". State of California. Retrieved March 23, 2013.
  5. ^ "California's 10th Congressional District - Representatives & District Map". Civic Impulse, LLC. Retrieved May 6, 2023.
  6. ^ "2019 U.S. Gazetteer Files". United States Census Bureau. Retrieved July 1, 2020.
  7. ^ "Oakley (city) QuickFacts". United States Census Bureau.
  8. ^ Gudde, Erwin G. "California Place Names: The Origin and Etymology of Current Geographic Names", 4th ed, University of California Press, p. 266
  9. ^ "Conservancy's recent California acquisitions: Part 2: Simone Mound, in: The Archaeological". June 24, 2020. Retrieved March 26, 2021.
  10. ^ Durham, David L. (1998). California's Geographic Names: A Gazetteer of Historic and Modern Names of the State. Clovis, Calif.: Word Dancer Press. p. 674. ISBN 1-884995-14-4.
  11. ^ "City of Oakley - City of Oakley". City of Oakley. Retrieved April 4, 2018.
  12. ^ "Money Official Site - Finance News & Advice Since 1972". Archived from the original on June 1, 2022. Retrieved April 4, 2018.
  13. ^[bare URL PDF]
  14. ^ "California Elections Data" (PDF). Retrieved October 16, 2019.
  15. ^
  16. ^ "East Contra Costa County Bicycle Facilitees" (PDF). Retrieved April 4, 2018.
  17. ^ "Census of Population and Housing". Retrieved June 4, 2015.
  18. ^ "2010 Census Interactive Population Search: CA - Oakley city". U.S. Census Bureau. Archived from the original on July 15, 2014. Retrieved July 12, 2014.
  19. ^ "U.S. Census website". United States Census Bureau. Retrieved January 31, 2008.
  20. ^ "Oakley Library." Contra Costa County Library. Retrieved on April 1, 2010.