thumb|300px|[[County seat Chillicothe is the birthplace of sliced bread]]
Livingston County is a county located in the northwestern portion of the U.S. state of Missouri. As of the 2020 census, the population was 14,557. Its county seat is Chillicothe. The county was organized January 6, 1837, and named for U.S. Secretary of State Edward Livingston.
Geography
According to the U.S. Census Bureau, the county has a total area of , of which is land and (1.2%) is water.
Adjacent counties
- Grundy County (north)
- Linn County (east)
- Chariton County (southeast)
- Carroll County (south)
- Caldwell County (southwest)
- Daviess County (northwest)