Troop 3

Counties Served: Boone, Cook, DeKalb, Grundy, Kane, Kendall, Lake, McHenry, and Will

Troop 3 encompasses Boone, Cook, DeKalb, Grundy, Kane, Kendall, Lake, McHenry, and Will counties. Headquarters are located in Des Plaines, Elgin, and Joliet. The primary function of Troopers in Troop 3 is to patrol interstates I-55, I-80, I-57, I-355, I-290, IL-53, and many rural/unincorporated areas throughout the counties. In addition to normal patrol functions, ISP Troopers work throughout the Troop addressing gun and drug trafficking within local communities and on the interstates. ISP responsibilities include traffic enforcement, criminal patrol, commercial motor vehicle enforcement, and assisting the public on Illinois roadways.

Contact Us

  • Headquarters
  • Des Plaines
    • 9511 W. Harrison St.
    • Des Plaines, IL 60016
    • Phone: (847) 294-4400

    • Public Lobby Hours:
    • 24 hours
  • Elgin
    • 777 S. State St.
    • Elgin, IL 60123
    • Phone: (847) 931-2405

    • Public Lobby Hours:
    • None
  • Joliet
    • 16648 S. Broadway St.
    • Lockport, IL 60441
    • Phone: (815)726-6377

    • Public Lobby Hours:
    • Monday-Friday, 8:00 a.m. – 3:00 p.m.
    • (Excluding holidays and weekends)