St. Rose, Louisiana, United States [CDP]; population was 6,259 in 1990; housing units was 2,384 in 1990; location is 29°58'N 90°19'W; land area is 4.04 square miles (2,584 acres); water area is 0.01 square miles (9 acres); FIPS code is 67740 [SourceCBP]