Gardnertown, New York, United States [CDP]; population was 4,209 in 1990; housing units was 1,565 in 1990; location is 41°32'N 74°4'W; land area is 4.90 square miles (3,134 acres); water area is 0.01 square miles (5 acres); FIPS code is 28310 [SourceCBP]