Herndon, PA -- U.S. borough in Pennsylvania Population (2000): 383 Housing Units (2000): 192 Land area (2000): 0.801945 sq. miles (2.077028 sq. km) Water area (2000): 0.977820 sq. miles (2.532543 sq. km) Total area (2000): 1.779765 sq. miles (4.609571 sq. km) FIPS code: 34080 Located within: Pennsylvania (PA), FIPS 42 Location: 40.704241 N, 76.843212 W ZIP Codes (1990): 17830 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Herndon, PA Herndon