Arnold, PA -- U.S. city in Pennsylvania Population (2000): 5667 Housing Units (2000): 2976 Land area (2000): 0.735343 sq. miles (1.904529 sq. km) Water area (2000): 0.049165 sq. miles (0.127336 sq. km) Total area (2000): 0.784508 sq. miles (2.031865 sq. km) FIPS code: 03088 Located within: Pennsylvania (PA), FIPS 42 Location: 40.577633 N, 79.764518 W ZIP Codes (1990): 15068 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Arnold, PA Arnold