61301 -- U.S. ZIP code Municipality (1990): LA SALLE, Illinois All ZIPs for this municipality (1990): 61301 Population (2000): 10433 Housing Units (2000): 4800 Land area (2000): 39.102327 sq. miles (101.274558 sq. km) Water area (2000): 0.087679 sq. miles (0.227088 sq. km) Total area (2000): 39.190006 sq. miles (101.501646 sq. km) Located within: Illinois (IL) Location: 41.347117 N, 89.089741 W