Buchanan County, Randolph County, Clinton County, Nodaway County, Andrew County, Livingston County, Linn County, Grundy County, DeKalb County, Caldwell County, Daviess County, Carroll County, Harrison County, Chariton County, Gentry County, Atchison County, Putnam County, Holt County, Mercer County, and Worth County are the counties generally considered part of Northwest Missouri.