There are 7 US Post Offices in Wright County serving a total of 21,770 residents equating to 3,110 residents per post office. It's estimated that approximately 34,747 packages are handled across the 7 county post offices annually. Wright County is a county located in the southern portion of the U.S. state of Missouri. As of the 2010 census, the population was 18,815. Its county seat is Hartville. The county was officially organized on January 29, 1841, and is named after Silas Wright (D-New York), a former Congressman, U.S. Senator and Governor of New York."