Feather Sound, Florida, United States [CDP]; population was 2,690 in 1990; housing units was 1,535 in 1990; location is 27°55'N 82°39'W; land area is 4.21 square miles (2,695 acres); water area is 9.88 square miles (6,322 acres); FIPS code is 21945 [SourceCBP]