Places in Illinois
1,065 indexed places and 102 counties in Illinois. Population estimates are for 2023.
Largest places in Illinois
Chicago 2,664,452 · Cook CountyAurora 177,563 · Kane CountyJoliet 150,489 · Will CountyNaperville 150,245 · DuPage CountyRockford 146,120 · Winnebago CountyElgin 113,310 · Kane CountySpringfield 112,544 · Sangamon CountyPeoria 110,460 · Peoria CountyChampaign 89,189 · Champaign CountyWaukegan 87,642 · Lake CountyCicero 81,004 · Cook CountyBloomington 78,587 · McLean CountySchaumburg 75,750 · Cook CountyEvanston 75,070 · Cook CountyArlington Heights 74,495 · Cook CountyBolingbrook 74,088 · Will CountyDecatur 68,670 · Macon CountySkokie 64,937 · Cook CountyPalatine 64,869 · Cook CountyDes Plaines 58,010 · Cook CountyOrland Park 57,074 · Cook CountyOak Lawn 55,734 · Cook CountyBerwyn 54,414 · Cook CountyMount Prospect 54,298 · Cook CountyTinley Park 53,886 · Cook CountyWheaton 52,938 · DuPage CountyNormal 52,618 · McLean CountyOak Park 52,055 · Cook CountyHoffman Estates 50,179 · Cook CountyDowners Grove 49,706 · DuPage CountyPlainfield 47,448 · Will CountyGlenview 46,904 · Cook CountyElmhurst 45,336 · DuPage CountyLombard 43,779 · DuPage CountyBuffalo Grove 42,482 · Lake CountyMoline 41,965 · Rock Island CountyRomeoville 40,955 · Will CountyCrystal Lake 40,861 · McHenry CountyBelleville 40,726 · St. Clair CountyDeKalb 40,211 · DeKalb CountyBartlett 39,992 · DuPage CountyCarol Stream 38,966 · DuPage CountyQuincy 38,803 · Adams CountyUrbana 38,209 · Champaign CountyPark Ridge 37,897 · Cook CountyStreamwood 37,780 · Cook CountyWheeling 37,725 · Cook CountyCarpentersville 37,099 · Kane CountyOswego 37,074 · Kendall CountyHanover Park 36,165 · Cook CountyRock Island 36,132 · Rock Island CountyAddison 35,167 · DuPage CountyCalumet City 34,358 · Cook CountyNorthbrook 33,977 · Cook CountyWoodridge 33,566 · DuPage CountySt. Charles 32,654 · Kane CountyGlendale Heights 32,409 · DuPage CountyO'Fallon 31,968 · St. Clair CountyMundelein 31,790 · Lake CountyElk Grove Village 31,350 · Cook County
Counties in Illinois
Cook County 5,087,072Lake County 708,760DuPage County 921,213McHenry County 312,800Madison County 262,752Will County 700,728St. Clair County 251,018Kane County 514,982Sangamon County 193,491Champaign County 205,644LaSalle County 108,309McLean County 170,441Bureau County 32,729Vermilion County 71,652Iroquois County 26,136Tazewell County 129,541Macoupin County 44,018Peoria County 177,513Rock Island County 141,236Kankakee County 105,940Franklin County 37,138Fulton County 32,541Montgomery County 27,663Woodford County 38,285Clinton County 36,785Macon County 100,591DeKalb County 100,288Williamson County 66,706Ogle County 51,265Randolph County 29,815Winnebago County 280,922Knox County 48,411Henry County 48,448Adams County 64,441Stephenson County 43,105Marion County 36,673Livingston County 35,320Shelby County 20,568Jackson County 52,141Grundy County 53,578