Illinois counties
Quick answer
Illinois has 102 counties and county equivalents holding 12,692,653 residents. The statewide sales tax base rate is 6.25%, before county and city add-ons.
All 102 counties
Ranked by population, Census 2019-2023 ACS 5-year estimates.
| County | Population | Median income | Median home value | Median rent |
|---|---|---|---|---|
| Cook County | 5,185,812 | $81,797 | $305,200 | $1,381 |
| DuPage County | 927,263 | $110,502 | $374,100 | $1,628 |
| Lake County | 711,885 | $108,917 | $326,600 | $1,434 |
| Will County | 698,450 | $107,799 | $298,000 | $1,413 |
| Kane County | 516,097 | $100,678 | $303,000 | $1,404 |
| McHenry County | 311,366 | $102,836 | $286,900 | $1,358 |
| Winnebago County | 283,289 | $64,363 | $155,100 | $986 |
| Madison County | 264,631 | $74,800 | $167,900 | $969 |
| St. Clair County | 254,777 | $70,178 | $168,800 | $1,032 |
| Champaign County | 206,098 | $63,091 | $205,100 | $1,018 |
| Sangamon County | 195,217 | $74,114 | $170,300 | $954 |
| Peoria County | 179,831 | $64,938 | $152,600 | $946 |
| McLean County | 170,882 | $78,329 | $198,300 | $992 |
| Rock Island County | 142,995 | $66,768 | $144,700 | $863 |
| Kendall County | 135,053 | $110,474 | $298,900 | $1,763 |
| Tazewell County | 130,555 | $76,704 | $164,500 | $898 |
| LaSalle County | 109,049 | $72,281 | $154,900 | $906 |
| Kankakee County | 106,833 | $68,325 | $185,700 | $1,075 |
| Macon County | 102,591 | $62,449 | $121,800 | $797 |
| DeKalb County | 100,512 | $69,022 | $231,900 | $1,041 |
| Vermilion County | 73,179 | $54,537 | $92,900 | $802 |
| Williamson County | 66,902 | $65,521 | $145,600 | $897 |
| Adams County | 65,166 | $64,962 | $155,900 | $826 |
| Whiteside County | 55,192 | $64,536 | $125,800 | $808 |
| Boone County | 53,316 | $81,638 | $198,600 | $1,011 |
| Grundy County | 52,920 | $93,060 | $259,200 | $1,137 |
| Jackson County | 52,706 | $45,572 | $125,000 | $746 |
| Ogle County | 51,536 | $79,244 | $184,100 | $901 |
| Knox County | 49,294 | $53,291 | $104,900 | $725 |
| Henry County | 48,948 | $69,912 | $145,300 | $837 |
| Coles County | 46,689 | $56,040 | $121,900 | $793 |
| Macoupin County | 44,566 | $68,518 | $126,100 | $789 |
| Stephenson County | 44,042 | $61,943 | $127,500 | $764 |
| Woodford County | 38,348 | $85,629 | $193,800 | $907 |
| Franklin County | 37,541 | $53,471 | $87,700 | $771 |
| Marion County | 37,294 | $60,839 | $100,100 | $771 |
| Clinton County | 36,899 | $82,314 | $180,500 | $934 |
| Jefferson County | 36,808 | $61,102 | $118,400 | $862 |
| Livingston County | 35,659 | $70,796 | $131,500 | $855 |
| Monroe County | 34,969 | $101,635 | $265,600 | $996 |
| Effingham County | 34,505 | $75,380 | $179,800 | $734 |
| Lee County | 34,058 | $68,459 | $155,100 | $853 |
| Christian County | 33,684 | $59,253 | $112,100 | $729 |
| Fulton County | 33,259 | $58,617 | $102,500 | $808 |
| Bureau County | 33,027 | $65,894 | $121,900 | $838 |
| Morgan County | 32,621 | $65,175 | $128,700 | $710 |
| Randolph County | 30,142 | $68,870 | $134,100 | $760 |
| Montgomery County | 28,078 | $61,863 | $102,200 | $715 |
| Logan County | 27,870 | $64,188 | $125,900 | $804 |
| McDonough County | 27,102 | $50,434 | $103,500 | $730 |
| Iroquois County | 26,746 | $62,439 | $125,400 | $793 |
| Saline County | 23,387 | $54,945 | $92,900 | $711 |
| Jo Daviess County | 21,918 | $74,954 | $193,900 | $795 |
| Fayette County | 21,380 | $57,113 | $114,700 | $740 |
| Jersey County | 21,336 | $79,104 | $168,800 | $794 |
| Shelby County | 20,867 | $68,457 | $130,400 | $762 |
| Perry County | 20,810 | $59,286 | $105,200 | $714 |
| Douglas County | 19,686 | $74,186 | $142,600 | $818 |
| Crawford County | 18,588 | $67,614 | $113,700 | $761 |
| Hancock County | 17,434 | $65,044 | $108,400 | $755 |
| Union County | 16,972 | $56,420 | $131,700 | $658 |
| Piatt County | 16,702 | $87,516 | $173,200 | $950 |
| Edgar County | 16,637 | $56,909 | $95,700 | $757 |
| Bond County | 16,627 | $61,603 | $133,100 | $735 |
| Warren County | 16,576 | $64,650 | $101,300 | $694 |
| Wayne County | 15,994 | $53,107 | $109,400 | $632 |
| Richland County | 15,675 | $60,404 | $106,600 | $754 |
| Carroll County | 15,621 | $60,871 | $113,500 | $784 |
| Mercer County | 15,619 | $71,710 | $139,300 | $757 |
| De Witt County | 15,461 | $64,802 | $124,200 | $857 |
| Clark County | 15,328 | $70,625 | $123,100 | $828 |
| Lawrence County | 15,137 | $53,438 | $95,500 | $810 |
| Pike County | 14,625 | $58,029 | $100,100 | $659 |
| Moultrie County | 14,469 | $71,676 | $121,500 | $773 |
| Massac County | 13,958 | $62,584 | $118,000 | $793 |
| White County | 13,708 | $53,097 | $100,100 | $706 |
| Washington County | 13,682 | $75,652 | $149,800 | $776 |
| Ford County | 13,396 | $60,782 | $118,100 | $836 |
| Johnson County | 13,350 | $65,203 | $148,200 | $634 |
| Clay County | 13,173 | $57,266 | $94,300 | $709 |
| Mason County | 12,878 | $62,127 | $106,100 | $760 |
| Cass County | 12,826 | $64,907 | $95,500 | $723 |
| Menard County | 12,169 | $81,334 | $179,300 | $780 |
| Greene County | 11,837 | $60,976 | $94,400 | $800 |
| Marshall County | 11,715 | $69,818 | $137,800 | $767 |
| Wabash County | 11,199 | $53,650 | $103,900 | $774 |
| Cumberland County | 10,378 | $69,826 | $117,700 | $756 |
| Jasper County | 9,233 | $71,094 | $122,900 | $766 |
| Hamilton County | 7,972 | $61,520 | $108,800 | $566 |
| Schuyler County | 6,826 | $66,059 | $106,200 | $836 |
| Brown County | 6,320 | $72,288 | $142,200 | $724 |
| Henderson County | 6,284 | $65,651 | $101,600 | $834 |
| Edwards County | 6,118 | $59,386 | $97,500 | $746 |
| Putnam County | 5,600 | $77,526 | $167,800 | $804 |
| Stark County | 5,324 | $62,284 | $103,500 | $765 |
| Pulaski County | 5,074 | $43,227 | $81,000 | $625 |
| Alexander County | 5,042 | $43,523 | $58,700 | $540 |
| Gallatin County | 4,857 | $54,626 | $84,700 | $500 |
| Scott County | 4,847 | $73,013 | $101,700 | $669 |
| Calhoun County | 4,406 | $92,095 | $174,000 | $479 |
| Pope County | 3,757 | $62,500 | $165,300 | $438 |
| Hardin County | 3,623 | $57,155 | $91,700 | $342 |
Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year
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