There are 4 US Post Offices in Chester County serving a total of 14,819 residents equating to 3,705 residents per post office. It's estimated that approximately 23,653 packages are handled across the 4 county post offices annually. Chester County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 17,131. Its county seat is Henderson. The county was created in 1879 and organized in 1882. Chester County is included in the Jackson, TN Metropolitan Statistical Area."