Sonoma County is a county located in the U.S. state of California. As of the 2020 United States Census, its population was 488,863. Its seat of government and largest city is Santa Rosa.
Sebastopol is a city in Sonoma County, California, with a recorded population of 7,521, per the 2020 U.S. Census.
Petaluma is a city in Sonoma County, California, United States, located in the North Bay region of the San Francisco Bay Area. Its population was 59,776 according to the 2020 census.
Roseland is a neighborhood in Santa Rosa, California. As of the 2010 census, the population was 6,325. Roseland was an unincorporated enclave within the City of Santa Rosa until the area was annexed by Santa Rosa on November 1, 2017.
Santa Rosa is a city in and the county seat of Sonoma County, in the North Bay region of the Bay Area in California. Its population as of the 2020 census was 178,127. It is the largest city in California's Wine Country and Redwood Coast. It is the fifth most populous city in the Bay Area after San Jose, San Francisco, Oakland, and Fremont; and the 25th-most populous city in California.
Penngrove is a census-designated place (CDP) in Sonoma County, California, United States, situated between the cities of Petaluma and Cotati, at the foot of the western flank of Sonoma Mountain. It is part of the North Bay subregion of the San Francisco Bay Area. The population was 2,522 at the 2010 census.
Sonoma–Marin Area Rail Transit (SMART) is a rail line and bicycle-pedestrian pathway project in Sonoma and Marin counties of the U.S. state of California. When completed, the entire system will serve a 70-mile (110 km) corridor between Cloverdale in northern Sonoma County and Larkspur Landing in Marin County. In 2023, the system had a ridership of 749,700, or about 3,400 per weekday as of the third quarter of 2024.
The Northwestern Pacific Railroad is a 271-mile (436 km) mainline railroad from the former ferry connections in Sausalito, California north to Eureka, with a connection to the national railroad system at Schellville. The railroad has gone through a complex history of different ownership and operators but has maintained a generic name of reference as the Northwestern Pacific Railroad, despite no longer being officially named that.
Petaluma and Santa Rosa Railroad was a 600 volt DC electric interurban railway in Sonoma County, California, United States. It operated between the cities of Petaluma, Sebastopol, Forestville, and Santa Rosa. Company-owned steamboats provided service between Petaluma and San Francisco.
Mark West Creek is a 29.9-mile-long (48.1 km) stream that rises in the Mayacamas Mountains of Sonoma County, California, United States. Tributaries of Mark West Creek include Porter Creek and Hummingbird Creek, both of which originate in the same mountain range. Discharge waters of Mark West Creek reach the Russian River after a confluence with the Laguna de Santa Rosa. The Community Clean Water Institute has developed a program for monitoring pollutants in Mark West Creek.
San Francisco and North Pacific Railroad (SF&NP) provided the first extensive standard gauge rail service to Sonoma County and became the southern end of the regional Northwestern Pacific Railroad. Although first conceived of by Asbury Harpending, who had even obtained many of the right of ways, the SF&NP was bought and subsequently constructed by Peter Donahue, who drove the first spike on August 30, 1869.
The Petaluma and Santa Rosa Railway Power House is a historic building in Sebastopol, California, U.S., built to serve the Petaluma and Santa Rosa Railroad, an electric interurban railway of Sonoma County. It is also known as the Hogan Building and the P&SR Substation. It was listed on the National Register of Historic Places in 1991.
The Sonoma County Library is a medium-sized public library system that serves the nine cities and unincorporated areas of Sonoma County, California. The library system is a joint powers authority, with administration located at the Administrative Offices, 6135 State Farm Dr, Rohnert Park, CA 94928.
Sebastopol station was an interurban train station in Sebastopol, California. It was served by the Petaluma and Santa Rosa Railroad and was adjacent to the railway's powerhouse. Official operations ceased in 1932 with the rest of P&SR passenger service. It was leased as retail space for a time before being converted to a museum. The station was added to the National Register of Historic Places in 1996 as Sebastopol Depot of the Petaluma and Santa Rosa Railway.
The San Francisco Bay Area comprises nine northern California counties and contains five of the ten most expensive counties in the United States. Strong economic growth has created hundreds of thousands of new jobs, but coupled with severe restrictions on building new housing units, it has resulted in a statewide housing shortage which has driven rents to extremely high levels. The Sacramento Bee notes that large cities like San Francisco and Los Angeles both attribute their recent increases in homeless people to the housing shortage, with the result that homelessness in California overall has increased by 15% from 2015 to 2017. In September 2019, the Council of Economic Advisers released a report in which they stated that deregulation of the housing markets would reduce homelessness in some of the most constrained markets by estimates of 54% in San Francisco, 40 percent in Los Angeles, and 38 percent in San Diego, because rents would fall by 55 percent, 41 percent, and 39 percent respectively. In San Francisco, a minimum wage worker would have to work approximately 4.7 full-time jobs to be able to spend less than 30% of their income on renting a two-bedroom apartment.
Petaluma North station is a Sonoma–Marin Area Rail Transit station located at Corona Road and North McDowell Boulevard in Petaluma, California. It opened as an infill station on January 10, 2025.
The Tubbs Fire was a wildfire in Northern California during October 2017. At the time, the Tubbs Fire was the most destructive wildfire in California history, burning parts of Napa, Sonoma, and Lake counties, inflicting its greatest losses in the city of Santa Rosa. Its destructiveness was surpassed only a year later by the Camp Fire of 2018. The Tubbs Fire was one of more than a dozen large fires that broke out in early October 2017, which were simultaneously burning in eight Northern California counties, in what was called the "Northern California firestorm". By the time of its containment on October 31, the fire was estimated to have burned 36,810 acres (149 km2); at least 22 people were believed to have been killed in Sonoma County by the fire.
Tubbs Island is an island in San Pablo Bay. It is in Sonoma County, California, and parts of it are managed as part of the Napa-Sonoma Marshes Wildlife Area. Its coordinates are 38°08′59″N122°25′27″W, and the United States Geological Survey measured its elevation as 0 ft (0 m) in 1981. It, long with Island No. 1, Island No. 2 and Green Island, are labeled on a 1902 USGS map of the area.
