Summit State Bank provides various banking products and services to individuals and businesses primarily in Sonoma County, California. It offers personal and business checking, money market, sweep, savings, and demand accounts; time certificates of deposit; and specialized deposit accounts, such as professional, small business packaged, tiered, and retirement plan accounts. The company also provides loans, including commercial loans and leases; lines of credit; commercial real estate, small business administration, residential mortgage, and construction loans; home equity lines of credit; and term and equipment loans, as well as loans to agriculture-related businesses.