Andrew County is a county located in the northwestern part of the U.S. state of Missouri. As of the 2020 census, the county had a population of 18,135. Its county seat is Savannah. The county was organized January 29, 1841, and named for Andrew Jackson Davis, a lawyer and prominent citizen of St. Louis.

Savannah is a city and county seat of Andrew County, Missouri, United States. The population was 5,069 at the 2020 census.