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 2010 census was 35,432. Oakley was incorporated in 1999, making it the newest incorporated city in Contra Costa County. Oakley is part of the East Contra Costa Bicycle Plan, which has existing facilities in Oakley as well as plans for further expansion.
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 Oakley areas offers access to the Delta de Anza Regional Trail. According to reports provided by CNN, Oakley experiences 21.16 inches of annual rainfall with an average high temperature in July of 96.0 F and an average low temperature in January of 40.0 F. Oakley experiences 52% clear days throughout the year.
Oakley's west border is Highway 160, which provides access to Oakland, San Francisco, San Jose, Sacramento, and the Central Valley. 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.