64075 -- U.S. ZIP code Municipality (1990): OAK GROVE, Missouri All ZIPs for this municipality (1990): 64075 Population (2000): 9108 Housing Units (2000): 3342 Land area (2000): 50.550594 sq. miles (130.925431 sq. km) Water area (2000): 0.080710 sq. miles (0.209038 sq. km) Total area (2000): 50.631304 sq. miles (131.134469 sq. km) Located within: Missouri (MO) Location: 38.995350 N, 94.142253 W