61775 -- U.S. ZIP code Municipality (1990): STRAWN, Illinois All ZIPs for this municipality (1990): 61775 Population (2000): 310 Housing Units (2000): 118 Land area (2000): 35.336978 sq. miles (91.522350 sq. km) Water area (2000): 0.064287 sq. miles (0.166503 sq. km) Total area (2000): 35.401265 sq. miles (91.688853 sq. km) Located within: Illinois (IL) Location: 40.653799 N, 88.390268 W