Ranked from ACS 2023 5-Year
Largest US Counties by Population in Illinois
The most populous counties in the country, with what a median home costs to own in each. Between them these counties hold a large share of the American housing market.
Where does yours land?
Every county in America is somewhere on this scale, including the one you live in.
Illinois ranked
| # | County | Population | Monthly to own | Effective rate |
|---|---|---|---|---|
| 1 | Cook County | 5,185,812 | $2,709 | 1.983% |
| 2 | DuPage County | 927,263 | $3,309 | 2.094% |
| 3 | Lake County | 711,885 | $3,073 | 2.677% |
| 4 | Will County | 698,450 | $2,740 | 2.347% |
| 5 | Kane County | 516,097 | $2,792 | 2.386% |
| 6 | McHenry County | 311,366 | $2,680 | 2.493% |
| 7 | Winnebago County | 283,289 | $1,540 | 2.482% |
| 8 | Madison County | 264,631 | $1,573 | 1.925% |
| 9 | St. Clair County | 254,777 | $1,604 | 2.093% |
| 10 | Champaign County | 206,098 | $1,901 | 2.070% |
| 11 | Sangamon County | 195,217 | $1,600 | 1.978% |
| 12 | Peoria County | 179,831 | $1,488 | 2.239% |
| 13 | McLean County | 170,882 | $1,878 | 2.271% |
| 14 | Rock Island County | 142,995 | $1,432 | 2.330% |
| 15 | Kendall County | 135,053 | $2,793 | 2.528% |
| 16 | Tazewell County | 130,555 | $1,571 | 2.116% |
| 17 | LaSalle County | 109,049 | $1,496 | 2.154% |
| 18 | Kankakee County | 106,833 | $1,764 | 2.221% |
| 19 | Macon County | 102,591 | $1,214 | 2.102% |
| 20 | DeKalb County | 100,512 | $2,214 | 2.539% |
| 21 | Vermilion County | 73,179 | $950 | 1.793% |
| 22 | Williamson County | 66,902 | $1,364 | 1.710% |
| 23 | Adams County | 65,166 | $1,430 | 1.579% |
| 24 | Whiteside County | 55,192 | $1,250 | 2.127% |
| 25 | Boone County | 53,316 | $1,880 | 2.269% |
| 26 | Grundy County | 52,920 | $2,341 | 2.029% |
| 27 | Jackson County | 52,706 | $1,220 | 1.908% |
| 28 | Ogle County | 51,536 | $1,721 | 2.030% |
| 29 | Knox County | 49,294 | $1,060 | 1.949% |
| 30 | Henry County | 48,948 | $1,395 | 1.980% |
| 31 | Coles County | 46,689 | $1,209 | 2.046% |
| 32 | Macoupin County | 44,566 | $1,195 | 1.578% |
| 33 | Stephenson County | 44,042 | $1,300 | 2.463% |
| 34 | Woodford County | 38,348 | $1,825 | 2.180% |
| 35 | Franklin County | 37,541 | $887 | 1.501% |
| 36 | Marion County | 37,294 | $1,001 | 1.707% |
| 37 | Clinton County | 36,899 | $1,666 | 1.859% |
| 38 | Jefferson County | 36,808 | $1,147 | 1.711% |
| 39 | Livingston County | 35,659 | $1,303 | 2.180% |
| 40 | Monroe County | 34,969 | $2,321 | 1.703% |
| 41 | Effingham County | 34,505 | $1,607 | 1.509% |
| 42 | Lee County | 34,058 | $1,467 | 1.921% |
| 43 | Christian County | 33,684 | $1,095 | 1.691% |
| 44 | Fulton County | 33,259 | $1,056 | 2.133% |
| 45 | Bureau County | 33,027 | $1,211 | 2.069% |
| 46 | Morgan County | 32,621 | $1,248 | 1.880% |
| 47 | Randolph County | 30,142 | $1,238 | 1.400% |
| 48 | Montgomery County | 28,078 | $1,018 | 1.720% |
| 49 | Logan County | 27,870 | $1,220 | 1.839% |
| 50 | McDonough County | 27,102 | $1,067 | 2.162% |
| 51 | Iroquois County | 26,746 | $1,228 | 1.953% |
| 52 | Saline County | 23,387 | $931 | 1.555% |
| 53 | Jo Daviess County | 21,918 | $1,756 | 1.745% |
| 54 | Fayette County | 21,380 | $1,099 | 1.517% |
| 55 | Jersey County | 21,336 | $1,556 | 1.752% |
| 56 | Shelby County | 20,867 | $1,220 | 1.499% |
| 57 | Perry County | 20,810 | $1,037 | 1.658% |
| 58 | Douglas County | 19,686 | $1,353 | 1.813% |
| 59 | Crawford County | 18,588 | $1,095 | 1.556% |
| 60 | Hancock County | 17,434 | $1,081 | 1.863% |
| 61 | Union County | 16,972 | $1,220 | 1.405% |
| 62 | Piatt County | 16,702 | $1,591 | 1.755% |
| 63 | Edgar County | 16,637 | $952 | 1.544% |
| 64 | Bond County | 16,627 | $1,292 | 1.962% |
| 65 | Warren County | 16,576 | $1,026 | 1.896% |
| 66 | Wayne County | 15,994 | $1,058 | 1.527% |
| 67 | Richland County | 15,675 | $1,036 | 1.518% |
| 68 | Carroll County | 15,621 | $1,138 | 2.033% |
| 69 | Mercer County | 15,619 | $1,341 | 1.945% |
| 70 | De Witt County | 15,461 | $1,208 | 1.849% |
| 71 | Clark County | 15,328 | $1,182 | 1.684% |
| 72 | Lawrence County | 15,137 | $924 | 1.210% |
| 73 | Pike County | 14,625 | $988 | 1.555% |
| 74 | Moultrie County | 14,469 | $1,192 | 1.906% |
| 75 | Massac County | 13,958 | $1,123 | 1.499% |
| 76 | White County | 13,708 | $974 | 1.387% |
| 77 | Washington County | 13,682 | $1,415 | 1.846% |
| 78 | Ford County | 13,396 | $1,180 | 2.069% |
| 79 | Johnson County | 13,350 | $1,337 | 1.317% |
| 80 | Clay County | 13,173 | $947 | 1.615% |
| 81 | Mason County | 12,878 | $1,087 | 2.146% |
| 82 | Cass County | 12,826 | $995 | 2.102% |
| 83 | Menard County | 12,169 | $1,623 | 1.637% |
| 84 | Greene County | 11,837 | $951 | 1.657% |
| 85 | Marshall County | 11,715 | $1,334 | 1.991% |
| 86 | Wabash County | 11,199 | $1,011 | 1.471% |
| 87 | Cumberland County | 10,378 | $1,146 | 1.757% |
| 88 | Jasper County | 9,233 | $1,203 | 1.905% |
| 89 | Hamilton County | 7,972 | $1,038 | 1.351% |
| 90 | Schuyler County | 6,826 | $1,060 | 1.827% |
| 91 | Brown County | 6,320 | $1,309 | 1.470% |
| 92 | Henderson County | 6,284 | $1,010 | 1.676% |
| 93 | Edwards County | 6,118 | $960 | 1.466% |
| 94 | Putnam County | 5,600 | $1,525 | 1.590% |
| 95 | Stark County | 5,324 | $1,022 | 1.643% |
| 96 | Pulaski County | 5,074 | $789 | 0.825% |
| 97 | Alexander County | 5,042 | $667 | 1.646% |
| 98 | Gallatin County | 4,857 | $863 | 1.506% |
| 99 | Scott County | 4,847 | $986 | 1.382% |
| 100 | Calhoun County | 4,406 | $1,557 | 1.474% |
| 101 | Pope County | 3,757 | $1,427 | 1.021% |
| 102 | Hardin County | 3,623 | $893 | 1.176% |
Every figure is modelled on the county's own median home with 20% down at 7.03%. Property tax and electricity are county and state specific; homeowners insurance uses the NAIC average premium for that state, which ranges from 0.16% of home value in Hawaii to 1.16% in Oklahoma. Maintenance and water are national estimates. Full methodology.
Nationwide
Largest US Counties by Population across all 3,133 US counties · Every county in Illinois