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Rohnert Park

City of Rohnert Park

  •   State: 
    Sonoma County
    Rohnert Park
      County FIPS: 
    38°20′50″N 122°41′43″W
      Area total: 
    7.29 sq mi (18.88 km²)
      Area land: 
    7.29 sq mi (18.87 km²)
      Area water: 
    0.01 sq mi (0.01 km²)
    105 ft (32 m)
    Incorporated August 28, 1962
  •   Latitude: 
      Dman name cbsa: 
    Santa Rosa-Petaluma, CA
    Pacific Standard Time (PST) UTC-8:00; Pacific Daylight Time (PDT) UTC-7:00
      ZIP codes: 

    Rohnert Park, Sonoma County, California, United States

  •   Population: 
      Population density: 
    6,093 residents per square mile of area (2,352.4/km²)
      Household income: 
      Unemployment rate: 
  •   Sales taxes: 
      Income taxes: 

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. It is an early planned city and is the sister city of Hashimoto in Japan. Sonoma State University, part of the California State University system, is located nearby. The city neighborhoods east of Highway 101 are organized into sections, generally designated by the letters AH, J-M, R, S, and W. All creeks within the city limits have been channelized. The Graton Resort & Casino opened on November 5, 2013. The Rohnert Creek Fault is an active fault influencing earthquake activity in the city. The area also experiences earthquakes from the San Andreas Fault. The 200-acre (0.81 km²) solar-powered, zero-waste community currently under development is located in the northern section of the city, near the town of Cotati. The town was named after the Rohner Seed Farm, which was founded by Fred Rohners, a graduate of Stanford Law School, and his son Waldo Emerson Rohnners. In 1929, a successful businessman purchased a large ranch in the area and minimized flooding in the fields with a crude drainage system. 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 Sonomas County since 1905.


Rohnert Park is the primary city name, but also Cotati are acceptable city names or spellings. The official name is City of Rohnert Park. Rohnert Park is a 200-acre (0.81 km²) solar-powered, zero-waste community currently under development. It was the first town to incorporate in Sonoma County since 1905. The Graton Resort & Casino opened on November 5, 2013. The town was named after the Rohnert family, which owned the ROHNert Seed Farm. It is located between Sonoma Mountain and Petaluma Creek San Pablo Bay. It has a population of about 2,775 people, making it one of the fastest growing towns in the U.S. in the 1950s and 1960s. The city was incorporated in 1962 and is located on 1,325 acres (536 ha) of land, housing an estimated 3,000 people. The area was originally home to the Coast Miwok native people, and was granted to Captain Juan Castaneda in 1844 for his military services in the region. The grant encompassed present-day Penngrove, Cotati and Rohnerts Park. The Mexican government granted Rancho Cotate to Captain Castanedo in July 1844. In 1849, Dr. Thomas S. Page, of Cotati, bought the property and sold it off piecemeal to incoming settlers. In 1956, only four adults resided within the district boundaries. In 1957 and 1957, with the US Route 101 Freeway recently completed at the Cotati bypass, Rohners Park began to be laid out and built as a planned city.


According to the United States Census Bureau, Rohnert Park has a total area of 7.0 square miles (18 km²) 99.93% of the city is land and 0.07% of it water. The city neighborhoods east of Highway 101 are organized into sections, generally designated by the letters AH, J-M, R, S, and W. All creeks within the city limits have been channelized. The Rodgers Creek Fault is an active fault influencing earthquake activity in the city area. Sudden oak death fungus risks are present in the RohnERT Park area. Research is ongoing at the nearby Fairfield Osborn Preserve. The Laguna de Santa Rosa contains bands of thick native riparian vegetation, including willow (Salix spp.) and alder (Alnus spp) trees. There is a small reservoir called Roberts Lake at the north end of the City and a number of c Creeks. The City also experiences earthquakes from the San Andreas Fault. It is located on the California Bay Area's Bay Area Peninsula and the San Francisco Bay area's San Luis Obispo Bay Area. It has a population of 7,000 (as of the 2010 U.S. Census), making it one of the largest cities in the Bay Area, along with San Francisco and Los Angeles. It was founded in 1872 by German immigrants, who moved to the area in the late 19th century. The area was once known as "Rohnertsburg" and is now known as the "City of Oaks".


At the 2010 census Rohnert Park had a population of 40,971. The racial makeup of the city was 80.28% White, 1.97% African American, 5.58% Asian, 0.42% Pacific Islander, and 5.25% from two or more races. At the 2000 census there were 42,236 people in 15,503 households, including 9,797 families, in the city. 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%. The homeowner vacancy rate was 2.1%; the rental vacancy ratewas 4.8%. 55.8% of the population lived in owner- occupied housing units and 43.3% lived in rental housing units. The median income for a city household in 2010 was $942,42, and the family income was $41,757. About 4.6% of those under the age of 18 and 6.0%) of those over 64 were below the poverty line, including 4.2% of families and 8.7% of people aged 65 or older. The average household size is 2.65 and the average family size is 3.20. The city has a population density of 5,846.8 inhabitants per squaremile (2,257.5/km 2). The city's population was 31,178 (76.1%) in 2010.

Law and government

Rohnert Park is governed by a City Council of five members, who serve staggered four-year terms. In 2019, the City Council voted to transition from at-large elections to a district based system in which voters elect one councilmember to represent each district. County, state, and federal representation is split between Sonoma County's 2nd and 3rd supervisorial districts. In the U.S. House of Representatives, Rohnert park is part of California's 5th congressional district, represented by Democrat Mike Thompson. The city has 22,583 registered voters, of whom 48.8% are registered Democrats, 4,051 (17.9%) are registered Republicans, and 6,234 (27.6%) have declined to state a political party. In 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. Kao's family and attorney John Burris filed a lawsuit against the city, and received a settlement of $1 million in 2001. 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. On November 16, 2018, a civil rights lawsuit was filed against RohnERT Park alleging that police seized thousands of pounds of cannabis and hundreds of thousands of dollars of currency without issuing receipts.


Rohnert Park is served by a station on the SonomaMarin 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. The station is located on the rail line's Sonoma-Marin line. It is the first station in the region to be served by commuter rail. The line is expected to be fully operational by the end of the year.


Rancho Cotate High School is the main comprehensive high school for both Rohnert Park and Cotati.Alternative education consists of: Credo High School, a charter public high school, Flex Academy (on RCHS campus) and Phoenix High School. The city is also home to Sonoma State University. The Cotati-Rohnert park Unified School District serves the city, as well as the surrounding counties. The district is part of the California Department of Education and the California State Board of Education. The school district is made up of four schools: Cotati, Rohnerth Park, Cotati and Rohnersville. It also includes a small high school in Cotati called Technology High School and a small middle school in Rohnherth Park called Technology Middle School. It is the largest school district in the district. The schools are located in the Cotati area of California, with a population of about 6,000. The area is home to the University of Sonoma, which has an enrollment of about 2,000 students. The town also has a small college, Sonoma Valley State University, which is located in nearby Sonoma County. The university has anrollment of about 1,500 students and is the only one in the area with an university of that status. It was founded in the early 1900s and is located on the campus of the College of the Sequoias. It has a campus that is open to students from all over the world.

Air Quality, Water Quality, Superfund Sites & UV Index

The Air Quality index is in Rohnert Park, Sacramento County, California = 92.6. These Air Quality index is based on annual reports from the EPA. Higher values are better (100=best). The number of ozone alert days is used as an indicator of air quality, as are the amounts of seven pollutants including particulates, carbon monoxide, sulfur dioxide, lead, and volatile organic chemicals. The Water Quality Index is 30. A measure of the quality of an area’s water supply as rated by the EPA. Higher values are better (100=best). The EPA has a complex method of measuring the watershed quality, using 15 indicators such as pollutants, turbidity, sediments, and toxic discharges. The Superfund Sites Index is 20. Higher is better (100=best). Based upon the number and impact of EPA Superfund pollution sites in the county, including spending on the cleanup efforts. The UV Index in Rohnert Park = 4.9 and is a measure of an area's exposure to the sun's ultraviolet rays. This is most often a combination of sunny weather, altitude, and latitude. The UV Index has been defined by the WHO ( and is uniform worldwide.


The most recent city population of 44,390 individuals with a median age of 34 age the population grows by 0.09% in Rohnert Park, Sacramento County, California population since 2000 and are distributed over a density of 6,093 residents per square mile of area (2,352.4/km²). There are average 2.63 people per household in the 15,580 households with an average household income of $62,936 a year. The unemployment rate in Alabama is of the available work force and has dropped -5.86% over the most recent 12-month period and the projected change in job supply over the next decade based on migration patterns, economic growth, and other factors will increase by 18.38%. The number of physicians in Rohnert Park per 100,000 population = 242.3.


The annual rainfall in Rohnert Park = 25.2 inches and the annual snowfall = 0 inches. The annual number of days with measurable precipitation (over .01 inch) = 69. The average number of days per year that are predominantly sunny = 255. 82 degrees Fahrenheit is the average daily high temperature for the month of July and 38 degrees Fahrenheit is the average daily low temperature for the month of January. The Comfort Index (higher=better) is 45, where higher values mean a more pleasant climate. The Comfort Index measure recognizes that humidity by itself isn't the problem. (Have you noticed nobody ever complains about the weather being 'cold and humid?) It's in the summertime that we notice the humidity the most, when it's hot and muggy. Our Comfort Index uses a combination of afternoon summer temperature and humidity to closely predict the effect that the humidity will have on people.

Median Home Cost

The percentage of housing units in Rohnert Park, Sacramento County, California which are owned by the occupant = 56.53%. A housing unit is a house, apartment, mobile home, or room occupied as separate living quarters. The average age of homes = 28 years with median home cost = $240,970 and home appreciation of -15.64%. This is the value of the years most recent home sales data. Its important to note that this is not the average (or arithmetic mean). The median home price is the middle value when you arrange all the sales prices of homes from lowest to highest. This is a better indicator than the average, because the median is not changed as much by a few unusually high or low values. The property tax rate of $6.80 shown here is the rate per $1,000 of home value. If for simplification for example the tax rate is $14.00 and the home value is $250,000, the property tax would be $14.00 x ($250,000/1000), or $3500. This is the 'effective' tax rate.


The local school district spends $5,204 per student. There are 21.6 students for each teacher in the school, 6847 students for each Librarian and 938 students for each Counselor. 9.96% of the area’s population over the age of 25 with an Associate Degree or other 2-year college degree, 18.43% with a master’s degree, Ph.D. or other advanced college degree and 6.88% with high school diplomas or high school equivalency degrees (GEDs).

  • Rohnert Park's population in Sonoma County, California of 1,261 residents in 1900 has increased 35,2-fold to 44,390 residents after 120 years, according to the official 2020 census.

    Approximately 51.19% female residents and 48.81% male residents live in Rohnert Park, Sacramento County, California.

    As of 2020 in Rohnert Park, Sacramento County, California are married and the remaining 50.30% are single population.

  • 30.1 minutes is the average time that residents in Rohnert Park require for a one-way commute to work. A long commute can have different effects on health. A Gallup poll in the US found that in terms of mental health, long haul commuters are up to 12 percent more likely to experience worry, and ten percent less likely to feel well rested. The Gallup poll also found that of people who commute 61­–90 minutes each day, a whopping one third complained of neck and back pain, compared to less than a quarter of people who only spend ten minutes getting to work.

    77.79% of the working population which commute to work alone in their car, 11.84% of the working population which commutes to work in a carpool, 3.31% of the population that commutes using mass transit, including bus, light rail, subway, and ferry. 2.85% of the population that has their home as their principal place of work.

  • Of the total residential buildings in Rohnert Park, Sacramento County, California, 56.53% are owner-occupied homes, another 40.43% are rented apartments, and the remaining 3.04% are vacant.

  • The 31.40% of the population in Rohnert Park, Sacramento County, California who identify themselves as belonging to a religion are distributed among the following most diverse religions.

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