Rotonda, Florida, United States [CDP]; population was 3,576 in 1990; housing units was 2,235 in 1990; location is 26°53'N 82°17'W; land area is 12.07 square miles (7,725 acres); water area is 0.16 square miles (105 acres); FIPS code is 61937 [SourceCBP]