64494 -- U.S. ZIP code Municipality (1990): UNION STAR, Missouri All ZIPs for this municipality (1990): 64494 Population (2000): 989 Housing Units (2000): 426 Land area (2000): 59.541062 sq. miles (154.210636 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 59.541062 sq. miles (154.210636 sq. km) Located within: Missouri (MO) Location: 39.981974 N, 94.602882 W