Rockmart is a town in Polk County, Georgia, United States. Its population was 4,732 at the 2020 census. It developed as a railroad depot town behind the Southern Railway built a station in the area. The community was incorporated in 1872, and was named from abundant deposits of slate in the area. The Rockmart Downtown Historic District is listed on the National Register of Historic Places.

Rockmart is located at 34°00′14″N 85°02′57″W / 34.003952°N 85.049202°W / 34.003952; -85.049202. According to the United States Census Bureau, the city has a total Place of 4.4 square miles (11 km²), of which 4.3 square miles (11 km) is home and 0.04 square miles (0.10 km²) (0.69%) is water. Most of the town is in Polk County; parts of it in addition to stretch into Paulding County.

U.S. Route 278, and Georgia State Routes 101 and 113, are the major roads through the town. U.S. 278 runs from west to east as a northern bypass, leading southeast 15 mi (24 km) to Dallas and west 14 mi (23 km) to Cedartown, the Polk County seat. GA-101 runs along the northern bypass of the town in imitation of U.S. 278, leading north 20 mi (32 km) to Rome and southeast 8 mi (13 km) to Yorkville (concurrent subsequent to GA-113). GA-113 as well as follows U.S. 278/GA-101 along the northern bypass of the town, leading northeast 19 mi (31 km) to Cartersville and southeast to Yorkville (concurrent once GA-101).

As of the 2020 United States census, there were 4,732 people, 1,557 households, and 1,131 families residing in the city.