Colusa County Post Offices

415 5th St
Arbuckle, California 95912

357 Market St
Colusa, California 95932

170 Main St
Grimes, California 95950

260 Oak St
Maxwell, California 95955

259 Market St
Stonyford, California 95979

801 E St
Williams, California 95987

Colusa County

There are 6 US Post Offices in Colusa County serving a total of 21,078 residents equating to 3,513 residents per post office. It's estimated that approximately 33,643 packages are handled across the 6 county post offices annually. Colusa County is a county located in the U.S. state of California. As of the 2010 census, the population was 21,419. The county seat is Colusa. It is located in the Central Valley of California, northwest of the state capital, Sacramento."