Lewisburg is a city in, and the county seat of Marshall County, Tennessee, United States. The population was 12,288 in 2020. Lewisburg is located in Middle Tennessee, fifty miles south of Nashville and fifty-two miles north of Huntsville, Alabama. Residents have access to the larger cities via nearby I-65.

Marshall County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 34,318. Its county seat is Lewisburg. Marshall County comprises the Lewisburg Micropolitan Statistical Area, which is also included in the Nashville-Davidson–Murfreesboro–Franklin, TN Metropolitan Statistical Area. It is in Middle Tennessee, one of the three Grand Divisions of the state.