61561 -- U.S. ZIP code Municipality (1990): ROANOKE, Illinois All ZIPs for this municipality (1990): 61561 Population (2000): 2863 Housing Units (2000): 1081 Land area (2000): 60.360961 sq. miles (156.334165 sq. km) Water area (2000): 0.050362 sq. miles (0.130436 sq. km) Total area (2000): 60.411323 sq. miles (156.464601 sq. km) Located within: Illinois (IL) Location: 40.795911 N, 89.194195 W