Dyersburg is a city in and the county seat of Dyer County, Tennessee, United States, 77 miles (124 km) north-northeast of Memphis on the Forked Deer River. The population was 17,452 at the 2000 census.
Dyersburg is located at 36°2′22″N 89°22′58″W / 36.03944°N 89.38278°W / 36.03944; -89.38278 (36.039440, -89.382766). The city's proximity to the New Madrid Fault Zone makes it a place at risk for future earthquakes.
According to the United States Census Bureau, the city has a total area of 15.1 square miles (39.2 km²), of which, 15.1 square miles (39.0 km²) of it is land and 0.1 square miles (0.2 km²) of it (0.53%) is water.