Contra Costa County is located in the northern part of the Bay Area, and is named after the Contra Costa, a range of hills located in the area. The county is known for its rolling hills, picturesque waterways, and diverse landscape, which ranges from urban areas to rural farms and open spaces. With a population of over 1.1 million people, Contra Costa County has the 9th largest population in the state.
The county is home to Mount Diablo State Park, which offers panoramic views of the Bay Area, and the Claremont Canyon Regional Preserve, which is a destination for hikers and nature enthusiasts. The county is also home to the John Muir National Historic Site, which features the preserved home and laboratory of naturalist John Muir.
The local economy of Contra Costa County is diverse and includes a mix of manufacturing, retail, healthcare, and service industries. The county is home to a number of Fortune 500 companies, including Chevron, and is also a hub for biotechnology and renewable energy.
The county has a small but growing cannabis industry, with full legality of commercial, cultivation, and manufacturing.