Wright County is a county located in the southern portion of the U.S. state of Missouri. As of the 2020 census, the population was 18,188. Its county seat is Hartville. The county was officially organized on January 29, 1841, and is named after Silas Wright, a former Congressman, U.S. Senator and Governor of New York.

Hartville is a city in Wright County, Missouri, United States. The population was 594 at the 2020 census. It is the county seat of Wright County.