There are 8 US Post Offices in Cole County serving a total of 78,722 residents equating to 9,840 residents per post office. It's estimated that approximately 125,649 packages are handled across the 8 county post offices annually. Cole County is a county located in the central portion of the U.S. state of Missouri. As of the 2010 census, the population was 75,990. Its county seat is Jefferson City, the state capital. The county was organized November 16, 1820 and named after pioneer Captain Stephen Cole, an Indian fighter and pioneer settler, who built Cole's Fort in Boonville. Cole County is included in the Jefferson City, MO Metropolitan Statistical Area. It is located south of the Missouri River. In 2010, the center of population of Missouri was located in Cole County, near the village of Wardsville."