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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 (36.039440, -89.382766). The city's proximity to the New Madrid Fault Zone makes it an at-risk place to live.
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.