Carroll County is a county located in the U.S. state of Missouri. As of the 2020 census, the county had a population of 8,495. Its county seat is Carrollton. The county was organized on January 2, 1833, from part of Ray County and named for Charles Carroll of Carrollton, a signer of the Declaration of Independence.

Carrollton is a city in Carroll County, Missouri, United States. Carrollton won the 2005 All-America City Award, given out annually by the National Civic League. The population was 3,514 at the 2020 census. Carrollton is the county seat of Carroll County.