City of Rohnert Park
Rohnert Park sign between Commerce Boulevard and U.S. 101
Rohnert Park sign between Commerce Boulevard and U.S. 101
"The Friendly City"
Location in Sonoma County and the U.S. state of California
Location in Sonoma County and the U.S. state of California
City of Rohnert Park is located in the United States
City of Rohnert Park
City of Rohnert Park
Location in the United States
Coordinates: 38°20′50″N 122°41′43″W / 38.34722°N 122.69528°W / 38.34722; -122.69528
Country United States
State California
IncorporatedAugust 28, 1962[1]
 • TypeCouncil–manager
 • MayorSamantha Rodriguez
 • Vice MayorSusan Hollingsworth Adams
 • City ManagerMarcela Piedra[2]
 • Total7.29 sq mi (18.88 km2)
 • Land7.29 sq mi (18.87 km2)
 • Water0.01 sq mi (0.01 km2)  0.07%
Elevation105 ft (32 m)
 • Total44,390
 • Density6,093/sq mi (2,352.4/km2)
Time zoneUTC−8 (Pacific)
 • Summer (DST)UTC−7 (PDT)
ZIP codes[5]
Area code707
FIPS code06-62546
GNIS feature IDs1656263, 2410985

Rohnert Park is a city in Sonoma County, California, United States, located approximately 50 miles (80 km) north of San Francisco. The population at the 2020 United States Census was 44,390.[6] It is an early planned city and is the sister city of Hashimoto in Japan.[7] Sonoma State University, part of the California State University system, is located nearby.


Rohnert Park Expressway, Rohnert Park, California

Originally home of the Coast Miwok native people,[8] the Mexican government granted Rancho Cotate to Captain Juan Castaneda in July 1844 for his military services in the region. The grant encompassed present-day Penngrove, Cotati and Rohnert Park. "Cotate Rancho is a part of the Vallejo Township which is the plain between Sonoma Mountain and Petaluma Creek San Pablo Bay, and an east and west line dividing the tract from Santa Rosa Township."[9][10] In 1849, Dr. Thomas S. Page, of Cotati, bought Rancho Cotate. Over time, the property was broken up and sold off piecemeal to incoming settlers.[9]

The town of Rohnert Park was named after the Rohnert family, which owned the Rohnert Seed Farm. In 1929, a successful businessman, Waldo Emerson Rohnert (1869–1933), a native of Detroit, Michigan, purchased a large ranch in the area and minimized flooding in the fields with a crude drainage system. He died shortly thereafter. His son, Fred Rohnert, a graduate of Stanford Law School, took over the ranch and developed a seed growing business, the Rohnert Seed Farm, which became a major horticultural success for the county.[9]

In 1956, only four adults resided within the district boundaries. In 1956 and 1957, with the U.S. Route 101 Freeway recently completed at the Cotati bypass, Rohnert Park began to be laid out and built as a planned city. In a summer election in 1962, Rohnert Park was incorporated, comprising 1,325 acres (536 ha), housing an estimated 2,775 persons. It was the first town to incorporate in Sonoma County since 1905. The neighboring town of Cotati, California, voted to incorporate the following year.[9]

21st-century development

Sonoma Mountain Village Rohnert Park is a 200-acre (0.81 km2), solar-powered, zero-waste community currently under development.[11]

The Graton Resort & Casino opened on November 5, 2013.


According to the United States Census Bureau, Rohnert Park has a total area of 7.0 square miles (18 km2), 99.93% of it land and 0.07% of it water.

The city neighborhoods east of Highway 101 are organized into sections, generally designated by the letters A–H, J-M, R, S, and W. In most cases, the names of streets and parks begin with the letter of the section they are in.[12] K Section is also referred to as the "University District" and is the residential development of the City's University Specific Plan Area; W Section is also referred to as "Willowglen" and is the residential development of the City's Southeast Specific Plan Area.[13]

There is a small reservoir called Roberts Lake at the north end of the city and a number of creeks. Important creeks include the Laguna de Santa Rosa (which forms part of the border with the City of Cotati), Copeland Creek, Hinebaugh Creek, Crane Creek and Five Creek. All creeks within the city limits have been channelized. Spivock Creek, Coleman Creek, Wilfred Channel, and Labath Channel are artificial channels designed to convey runoff.

Five Creek

Riparian communities within the city are limited by channelization of creekbeds. Vegetation alongside the city's streams primarily consists of grass and sedge species. The Laguna de Santa Rosa contains bands of thick native riparian vegetation, including willow (Salix spp.) and alder (Alnus spp.) trees.[14]

Sudden oak death fungus risks are present in the Rohnert Park area. Research is ongoing at the nearby Fairfield Osborn Preserve.[15]


The Rodgers Creek Fault is an active fault influencing earthquake activity in the Rohnert Park area.[16] The city also experiences earthquakes from the San Andreas Fault.


Historical population
U.S. Decennial Census[17]
Graphs are temporarily unavailable due to technical issues.


At the 2010 census Rohnert Park had a population of 40,971. The population density was 5,846.8 inhabitants per square mile (2,257.5/km2). The racial makeup of Rohnert Park was 31,178 (76.1%) White, 759 (1.9%) African American, 407 (1.0%) Native American, 2,144 (5.2%) Asian, 179 (0.4%) Pacific Islander, 3,967 (9.7%) from other races, and 2,337 (5.7%) from two or more races. Hispanic or Latino of any race were 9,068 persons (22.1%).[18]

The census reported that 99.0% of the population lived in households and 1.0% lived in non-institutionalized group quarters.

There were 15,808 households, 4,842 (30.6%) had children under the age of 18 living in them, 6,546 (41.4%) were opposite-sex married couples living together, 1,883 (11.9%) had a female householder with no husband present, 907 (5.7%) had a male householder with no wife present. There were 1,201 (7.6%) unmarried opposite-sex partnerships, and 144 (0.9%) same-sex married couples or partnerships. 4,177 households (26.4%) were one person and 1,374 (8.7%) had someone living alone who was 65 or older. The average household size was 2.57. There were 9,336 families (59.1% of households); the average family size was 3.13.

The age distribution was 8,571 people (20.9%) under the age of 18, 6,853 people (16.7%) aged 18 to 24, 11,035 people (26.9%) aged 25 to 44, 10,710 people (26.1%) aged 45 to 64, and 3,802 people (9.3%) who were 65 or older. The median age was 33.0 years. For every 100 females, there were 95.3 males. For every 100 females age 18 and over, there were 92.7 males.

There were 16,551 housing units at an average density of 2,361.9 per square mile (911.9/km2), of which 54.0% were owner-occupied and 46.0% were occupied by renters. The homeowner vacancy rate was 2.1%; the rental vacancy rate was 4.8%. 55.8% of the population lived in owner-occupied housing units and 43.3% lived in rental housing units.


At the 2000 census there were 42,236 people in 15,503 households, including 9,797 families, in the city. The population density was 6,564.5 inhabitants per square mile (2,534.6/km2). There were 15,808 housing units at an average density of 2,457 per square mile (949/km2). The racial makeup of the city was 80.28% White, 1.97% African American, 0.78% Native American, 5.58% Asian, 0.42% Pacific Islander, 5.72% from other races, and 5.25% from two or more races. Hispanic or Latino of any race were 13.57%.[19]

Of the 15,503 households 35.1% had children under the age of 18 living with them, 46.7% were married couples living together, 11.9% had a female householder with no husband present, and 36.8% were non-families. 24.0% of households were one person and 7.7% were one person aged 65 or older. The average household size was 2.65 and the average family size was 3.20.

The age distribution was 25.3% under the age of 18, 14.8% from 18 to 24, 32.0% from 25 to 44, 19.8% from 45 to 64, and 8.1% 65 or older. The median age was 32 years. For every 100 females, there were 94.1 males. For every 100 females age 18 and over, there were 90.2 males. The median income for a household in the city was $51,942, and the median family income was $61,420. Males had a median income of $41,757 versus $31,149 for females. The per capita income for the city was $23,035. About 3.2% of families and 8.0% of the population were below the poverty line, including 4.6% of those under age 18 and 6.3% of those over age 64.

Law and government

City Council

Rohnert Park is governed by a City Council of five members, who serve staggered four-year terms. Municipal elections are held in November of even-numbered years.[20] In 2019, the Rohnert Park City Council voted to transition from at-large elections to a district based system in which voters elect one councilmember to represent each district.[21] Any registered voter who resides within Rohnert Park is eligible to run for City Council in the district in which they live.

County, state, and federal representation

Rohnert Park is split between Sonoma County's 2nd and 3rd supervisorial districts.[22][23]

In the California State Legislature, Rohnert Park is in the 3rd Senate District, represented by Democrat Bill Dodd,[24] and in the 4th Assembly District, represented by Democrat Cecilia Aguiar-Curry.[25]

In the United States House of Representatives, Rohnert Park is part of California's 4th congressional district, represented by Democrat Mike Thompson.[26]

According to the California Secretary of State, as of February 10, 2019, Rohnert Park has 22,583 registered voters. Of those, 11,010 (48.8%) are registered Democrats, 4,051 (17.9%) are registered Republicans, and 6,234 (27.6%) have declined to state a political party.[27]

Department of Public Safety

Rohnert Park is patrolled by the Rohnert Park Department of Public Safety, established in 1962, that operates as an integrated fire and police department. This is one of only two cities operating Departments of Public Safety in California.

Shooting of Kuanchung Kao

Main article: Shooting of Kuanchung Kao

On April 29, 1997, Kuanchung Kao was waving a wooden stick in the street in front of his driveway. When some neighbors called 911, two officers, Jack Shields and Mike Lynch, responded. Shields shot Kao once in the chest. Shields stated that he believed Kao was waving the stick in a martial arts fashion, and that he and Lynch had to respond by using deadly force. The incident was investigated by the Sonoma County Sheriff's Office, the Sonoma County District Attorney's Office, and FBI, who all cleared Shields. Kao's family and attorney John Burris filed a lawsuit against the city of Rohnert Park, and received a settlement of $1 million in 2001.

2015 police controversy

On July 29, 2015, Rohnert Park Public Safety Officer Dave Rodriguez[28] drew his sidearm during an encounter with city resident,[29] while the resident was hitching his boat trailer to his vehicle.[30] The resident recorded the incident and posted it on YouTube.[31][32]

Rodriguez was placed on administrative leave while the city conducted an internal investigation into the incident.[33] In August, 2015, the city engaged an independent investigator,[34] who found that Rodriguez's actions were within the law and followed department policy.[35]

A civil rights claim filed on behalf of the resident asserted that Rodriguez was trying to intimidate him.[28] The lawsuit concluded in a settlement.[36]

On November 16, 2018, a civil rights lawsuit was filed[37] against Rohnert Park alleging that Rohnert Park police "conspired to expand the legitimate interdiction mission to one of personal financial gain, and over the years seized thousands of pounds of cannabis and hundreds of thousands of dollars of currency without issuing receipts for the seizures, without making arrests for any crimes, and without any official report of the forfeitures being made".[38] KQED published an investigation[39] in June 2018, quoting complaints by other motorists saying they were "robbed" by the Rohnert Park police, including the officers named in the lawsuit. The police department has since ceased most of its seizure efforts.[38]

In 2020, the city agreed to a $2 Million settlement with the family of Branch Wroth, who died in police custody in 2017, after a $4 Million judgment was vacated on appeal.[40]


Rohnert Park is served by a station on the Sonoma–Marin Area Rail Transit commuter rail line since it became operational on August 25, 2017. Sonoma County Airport Express buses connect Rohnert Park with Oakland International Airport and San Francisco International Airport.[41]


Sonoma State University campus

The Cotati-Rohnert Park Unified School District serves the city, which is also home to Sonoma State University.

High schools

Rancho Cotate High School is the main comprehensive high school for both Rohnert Park and Cotati.

Alternative education consists of:

See also


  1. ^ "California Cities by Incorporation Date". California Association of Local Agency Formation Commissions. Archived from the original (Word) on November 3, 2014. Retrieved August 25, 2014.
  2. ^ "City Manager - City of Rohnert Park, California". Retrieved February 26, 2023.
  3. ^ "2019 U.S. Gazetteer Files". United States Census Bureau. Retrieved July 1, 2020.
  4. ^ "Rohnert Park". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved November 3, 2014.
  5. ^ "ZIP Code Lookup". United States Postal Service. Retrieved November 24, 2014.
  6. ^ "Census - Geography Profile: Rohnert Park city, California". United States Census Bureau. Retrieved March 1, 2022.
  7. ^ "Sister Cities Relations Committee". City of Rohnert Park, California. Retrieved January 5, 2015.
  8. ^ Access Genealogy
  9. ^ a b c d DeClercq, 1977.
  10. ^ Harris, 1980.
  11. ^ Peters, Adele (February 19, 2009). "Sonoma Mountain Village: Is Green Suburbia Possible?". worldchanging. Archived from the original on February 22, 2009. Retrieved February 19, 2009.
  12. ^ "Sonoma County Homes For Sale". Cynthia Larson. Retrieved November 28, 2014.
  13. ^ "Rohnert Park Local Hazard Mitigation Plan" (PDF). City of Rohnert Park. Retrieved July 13, 2021.
  14. ^ Earth Metrics, Environmental Impact Report for the City of Rohnert Park General Plan, C Michael Hogan, Marc Papineau, Ballard George et al., published by the city of Rohnert Park, California and the State of California Environmental Clearinghouse, Sacramento, Ca., Report Number 10351, March 9, 1990
  15. ^ Sonoma State University research study on Sudden Oak Death Fungus at Fairfield Osborn Preserve (2000)
  16. ^ "USGS, Seismicity in the Rohnert Park, California vicinity".
  17. ^ "Census of Population and Housing". Retrieved June 4, 2015.
  18. ^ "2010 Census Interactive Population Search: CA - Rohnert Park 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. ^ "City Council, City of Rohnert Park, California". Retrieved February 26, 2023.
  21. ^ "Information Lookup".
  22. ^ "Board of Supervisors - District 2". County of Sonoma. Retrieved January 8, 2014.
  23. ^ "Board of Supervisors - District 3". County of Sonoma. Retrieved January 8, 2014.
  24. ^ "Senators". State of California. Retrieved August 25, 2014.
  25. ^ "Members Assembly". State of California. Retrieved August 25, 2014.
  26. ^ "California's 4th Congressional District - Representatives & District Map". Civic Impulse, LLC. Retrieved February 13, 2023.
  27. ^ "CA Secretary of State – Report of Registration – February 10, 2019" (PDF). Retrieved March 12, 2019.
  28. ^ a b "Rohnert Park officer being sued for drawing gun on man". August 8, 2015.
  29. ^ "Rohnert Park Cop Who Pulled Gun Out on Man Placed on Leave".
  30. ^ "SEE IT: California cop pulls gun on man recording video of him - NY Daily News". New York Daily News.
  31. ^ Archived at Ghostarchive and the Wayback Machine: "Rohnert park police". YouTube.
  32. ^ "Cop confrontation goes viral - CNN Video". CNN. August 7, 2015.
  33. ^ Rocha, Veronica (August 7, 2015). "Northern California cop placed on leave after pulling gun on man recording him". Los Angeles Times. Retrieved September 3, 2020.
  34. ^ "City of Rohnert Park California : City News : Message about video of Rohnert Park Public Safety Officer". City of Rohnert Park, California. August 4, 2015. Archived from the original on September 24, 2015.
  35. ^ "What happened with the Rohnert Park police encounter that went viral?". October 26, 2016.
  36. ^ "16-2705 - McComas v. Rohnert Park et al". Retrieved June 13, 2020.
  37. ^ "Ezekial Flatten v. City of Rohnert Park, Jacy Tatum, Joseph Huffaker, The Hopland Band of Pomo Indians, Steve Hobb" (PDF). Retrieved December 7, 2018.
  38. ^ a b Ciaramella, C. J. (November 30, 2018). "Lawsuit Alleges California Cops Stole Weed and Cash During Traffic Stops - Hit & Run". Retrieved December 7, 2018.
  39. ^ "'Highway Robbery': Drivers Allege Rohnert Park Police Illegally Seized Cannabis, Cash". KQED. June 9, 2018. Retrieved December 7, 2018.
  40. ^ "Wroth family settles for $2 million in Rohnert Park suffocation death". October 6, 2020.
  41. ^ "Sonoma County Airport Express Inc". Sonoma County Airport Express.