FSDO offices serving Illinois

Adams County, Alexander County, Bond County, Brown County, Calhoun County, Cass County, Champaign County, Christian County, Clark County, Clay County, Clinton County, Coles County, Crawford County, Cumberland County, De Witt County, Douglas County, Edgar County, Edwards County, Effingham County, Fayette County, Ford County, Franklin County, Fulton County, Gallatin County, Greene County, Hamilton County, Hancock County, Hardin County, Henderson County, Iroquois County, Jackson County, Jasper County, Jefferson County, Jersey County, Johnson County, Knox County, Lawrence County, Livingston County, Logan County, Macon County, Macoupin County, Marion County, Marshall County, Mason County, Massac County, McDonough County, McLean County, Menard County, Mercer County, Montgomery County, Morgan County, Moultrie County, Peoria County, Perry County, Piatt County, Pike County, Pope County, Pulaski County, Randolph County, Richland County, Saline County, Sangamon County, Schuyler County, Scott County, Shelby County, Stark County, Tazewell County, Union County, Vermilion County, Wabash County, Warren County, Washington County, Wayne County, White County, Williamson County, Woodford County

Boone County, Bureau County, Carroll County, Cook County, DeKalb County, DuPage County, Grundy County, Henry County, Jo Daviess County, Kane County, Kankakee County, Kendall County, LaSalle County, Lake County, Lee County, McHenry County, Ogle County, Putnam County, Rock Island County, Stephenson County, Whiteside County, Will County, Winnebago County

Madison County, Monroe County, St. Clair County