There are 172 Banks & Credit Unions in Sonoma County, California, serving a population of 500,943 people in an area of 1,576 square miles. There is 1 Bank & Credit Union per 2,912 people, and 1 Bank & Credit Union per 9 square miles.
In California, Sonoma County is ranked 25th of 58 counties in Banks & Credit Unions per capita, and 16th of 58 counties in Banks & Credit Unions per square mile.