Mount Olive, IL -- U.S. city in Illinois Population (2000): 2150 Housing Units (2000): 991 Land area (2000): 1.103558 sq. miles (2.858202 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.103558 sq. miles (2.858202 sq. km) FIPS code: 51024 Located within: Illinois (IL), FIPS 17 Location: 39.071624 N, 89.726719 W ZIP Codes (1990): 62069 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Mount Olive, IL Mount Olive