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Duncannon

1. Duncannon, Pennsylvania, United States [Borough]; population was 1,450 in 1990; housing units was 643 in 1990; location is 40°24'N 77°2'W; land area is 0.42 square miles (271 acres); FIPS code is 20240 [SourceCBP]
2. Duncannon, Pennsylvania, United States [Populated Place] is in Perry County; location is 40°23'53"N 77°1'24"W [SourceGSP]
3. Duncannon, Pennsylvania, United States Postal Service Zip Code is 17020 [SourcePSZ]