Kennett is a city in Dunklin County, Missouri, United States. The population was 11,260 at the 2000 census, but a 2008 estimate indicates a 4.9% decrease in population to 10,707. Kennett is the county seat of Dunklin County. The city is located in the southeast corner (or "Bootheel") of Missouri, 4 miles east of Arkansas and 20 miles from the Mississippi River.