Rosaryville, Maryland, United States [CDP]; population was 8,976 in 1990; housing units was 3,009 in 1990; location is 38°47'N 76°50'W; land area is 13.89 square miles (8,892 acres); water area is 0.00 square miles (2 acres); FIPS code is 68300 [SourceCBP]