Butler is a city in Bates County, Missouri, United States and is part of the Kansas City metropolitan area. The population was 4,219 at the 2010 census. The county seat of Bates County, the city is named for William Orlando Butler, a noted American military and political figure of the early and mid-19th century. It is located approximately 50 mi (80 km) south of Kansas City, Missouri on U.S. Route 71-Interstate 49.

Bates County is a county located in the west central part of the U.S. state of Missouri, two counties south of the Missouri River and is part of the Kansas City metropolitan area. As of the 2020 census, the population was 16,042. Its county seat is Butler. The county was organized in 1841 and named after Frederick Bates, the second Governor of Missouri.