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Dupo

1. Dupo, Illinois, United States [Populated Place] is in St. Clair County; location is 38°30'58"N 90°12'37"W [SourceGSP]
2. Dupo, Illinois, United States [Village]; population was 3,164 in 1990; housing units was 1,358 in 1990; location is 38°31'N 90°13'W; land area is 3.00 square miles (1,919 acres); FIPS code is 21254 [SourceCBP]
3. Dupo, Illinois, United States Postal Service Zip Code is 62239 [SourcePSZ]