Many notable figures came from the area including conservationist John Muir and legendary baseball great Joe DiMaggio. California's first doctor, John Marsh, settled in 1837 on a large land grant that is now called Marsh Creek.
The county has a strong economy, with major industries including healthcare, education, and technology. Some of the largest employers in Contra Costa County include Kaiser Permanente, Chevron, and the Mount Diablo Unified School District.
County seat, Martinez. Created February 18, 1850. The name signifies “opposite coast,” because of its situation opposite San Francisco, in an easterly direction, on San Francisco Bay.
Nortonville, 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 (244 m).
If you own and occupy your home as your principal place of residence on January 1, you may apply for an exemption of $7,000 off your assessed value for an annual savings of approximately $70 on your property taxes. New property owners will automatically receive an exemption application.
Contra Costa County, California Contra Costa County County seat Martinez Largest city Concord (population and land area) Richmond (total area) Government • Type Council–CAO33 more rows
1. Senior Citizen Homeowners' Property Tax Exemption. The Senior Citizen Homeowners' Property Tax Exemption is available to homeowners who are at least 65 years old and meet certain income requirements.
To obtain the exemption for a property, you must be its owner or co-owner (or a purchaser named in a contract of sale), and you must live in the property as your principal place of residence. You must also file the appropriate exemption claim form with the Assessor.
What is a Homeowner's Exemption? If you own and occupy your principal place of residence on January 1, you may apply for a Homeowner's Exemption that would exempt $7,000 of your home's assessed value from taxation. This would result in a savings of approximately $70 per year on your property tax bill.