First briefly called Union, it was renamed for Savannah, Georgia. Savannah, the county seat, was laid out in 1841. Pioneers were from Ohio, Indiana, Tennessee, Kentucky, Virginia, and other parts of Missouri. Louis editor, the county was first settled in the middle 1830s. The following material is inscribed on a plaque erected by the State Historical Society of Missouri and State Highway Commission in 1960, now located by the Andrew County Courthouse:Īndrew County, organized 1841, is one of six counties in the Indian Platte Purchase Territory annexed to Missouri in 1837. Joseph, MO– KS Metropolitan Statistical Area, which is included in the Kansas City- Overland Park- Kansas City Combined statistical area. The county was organized January 29, 1841, and named for Andrew Jackson Davis, a lawyer and prominent citizen of St. As of the 2020 census, the county had a population of 18,135. Andrew County is a county located in the northwestern part of the U.S.