61738 -- U.S. ZIP code Municipality (1990): EL PASO, Illinois All ZIPs for this municipality (1990): 61738 Population (2000): 4457 Housing Units (2000): 1687 Land area (2000): 98.231783 sq. miles (254.419140 sq. km) Water area (2000): 0.066173 sq. miles (0.171387 sq. km) Total area (2000): 98.297956 sq. miles (254.590527 sq. km) Located within: Illinois (IL) Location: 40.731662 N, 89.039782 W