There are 9 US Post Offices in Sutter County serving a total of 59,782 residents equating to 6,642 residents per post office. It's estimated that approximately 95,419 packages are handled across the 9 county post offices annually. Sutter County is a county in the U.S. state of California. As of the 2010 census, the population was 94,737. The county seat is Yuba City. Sutter County is included in the Yuba City, CA Metropolitan Statistical Area as well as the Sacramento-Roseville, CA Combined Statistical Area. The county is located along the Sacramento River in the Sacramento Valley."