Mar-Mac, North Carolina, United States [CDP]; population was 3,282 in 1990; housing units was 1,326 in 1990; location is 35°20'N 78°3'W; land area is 4.46 square miles (2,851 acres); water area is 0.03 square miles (18 acres); FIPS code is 41540 [SourceCBP]