Contra Costa County is a county in the state of California in the United States. As of the 2010 census, the population was 1,049,025. The county seat is Martinez. It occupies the northern portion of the East Bay region of the San Francisco Bay Area, and is primarily suburban. The county's name is Spanish for "opposite coast", referring to its position on the other side of the bay from San Francisco. Contra Costa County is included in the San Francisco–Oakland–Berkeley, CA Metropolitan Statistical Area.
Antioch is the second largest city in Contra Costa County, California, United States. Located in the East Bay region of the San Francisco Bay Area along the San Joaquin-Sacramento River Delta. The city's population was 102,372 at the 2010 census and estimated to be 111,502 in 2019.
Pittsburg is a city in Contra Costa County, California, United States. It is an industrial suburb located on the southern shore of the Suisun Bay in the East Bay region of the San Francisco Bay Area, and is part of the Sacramento–San Joaquin River Delta area. The population was 63,264 at the 2010 United States Census.
The United States Attorney for the Northern District of California is the United States Attorney responsible for representing the federal government in the United States District Court for the Northern District of California.
Nortonville is an unincorporated ghost town in Contra Costa County, California. It was located on Kirker Creek 5.5 miles (9 km) north-northeast of Mount Diablo, at an elevation of 801 feet.
Marsh Creek Springs is an unincorporated community in Contra Costa County, California, United States. It lies at an elevation of 584 feet. It consists of approximately 2 by 8 blocks along Marsh Creek Road southeast of Clayton. The town is named for Marsh Creek, a local stream. The ZIP Code is 94517. The community is inside area code 925. It is named after John Marsh.
Rock City is an Unincorporated community in Contra Costa County, California, United States. It lies at an elevation of 1,545 feet (471 m). The ZIP Code is 94528. The community is inside area code 925.
This is a list of the National Register of Historic Places listings in Contra Costa County, California.
Maltby is an unincorporated community in Contra Costa County, California, United States. It is located on the Atchison, Topeka and Santa Fe Railroad 3.5 miles (5.6 km) east of Martinez, at an elevation of 16 feet.
Nichols is an unincorporated community in Contra Costa County, California, United States. It is on the Atchison, Topeka and Santa Fe Railroad 5.5 miles (9 km) west of Pittsburg, at an elevation of 62 feet. The place is named for William H. Nichols, who was a landowner here.
Arbor is an unincorporated community in Contra Costa County, California, United States. It lies at an elevation of 98 feet. Arbor is located at 37°57′42″N121°43′24″W.
Bixler is an unincorporated community in Contra Costa County, California, United States. It is located on the BNSF Railway 4 miles (6.4 km) east of Brentwood, at an elevation of 16 feet.
Cornwall, formerly known as Cornwall Station, was an unincorporated community in Contra Costa County, California, before it was absorbed into the City of Pittsburg. It was located 7.25 miles (11.67 km) east-southeast of Baypoint and 1 mile (1.6 km) south of downtown Pittsburg, at an elevation of 39 feet (12 m) ASL.
Crolona Heights is an unincorporated community in Contra Costa County, California, United States. It lies at an elevation of 89 feet.
Four Corners is an unincorporated community in Contra Costa County, California, United States. It is located 4 miles (6.4 km) north-northeast of Walnut Creek, at an elevation of 49 feet.
Gateley is an unincorporated community in Contra Costa County, California, United States. It is on a former Atchison, Topeka and Santa Fe Railroad line, now owned by BNSF, 3 miles (4.8 km) west of Pinole, at an elevation of 82 feet.
Hookston is an unincorporated community in Contra Costa County, California, United States. It is located on the Southern Pacific Railroad 2.5 miles (4.0 km) north of downtown Walnut Creek, at an elevation of 62 feet.
Las Juntas, formerly known as Oakleigh, is an unincorporated community in Contra Costa County, California, United States. It is located on the Southern Pacific Railroad 2 miles (3.2 km) north of downtown Walnut Creek, at an elevation of 82 feet.
McAvoy is an unincorporated community in Contra Costa County, California, United States. It is located on the Atchison, Topeka and Santa Fe Railroad 4.25 miles (6.8 km) west of Pittsburg, at an elevation of 20 feet.
Neroly is an unincorporated community in Contra Costa County, California, United States. It is located on the Southern Pacific Railroad 4.25 miles (6.8 km) northwest of Brentwood, at an elevation of 75 feet.
