Opp, AL -- U.S. city in Alabama Population (2000): 6607 Housing Units (2000): 3187 Land area (2000): 17.149971 sq. miles (44.418220 sq. km) Water area (2000): 0.865352 sq. miles (2.241251 sq. km) Total area (2000): 18.015323 sq. miles (46.659471 sq. km) FIPS code: 57120 Located within: Alabama (AL), FIPS 01 Location: 31.283083 N, 86.254661 W ZIP Codes (1990): 36467 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Opp, AL Opp