Illinois counties ranked by the diversity index, the chance that two public school students picked at random from the county belong to different racial or ethnic groups. Counties need at least 3 schools and 1,000 students to qualify. The median ranked county is at 28.7%. Showing ranks 51 to 89.
| # | County | State | Diversity index |
|---|---|---|---|
| 51 | Union County | IL | 23.3% |
| 52 | Clinton County | IL | 23.2% |
| 53 | Carroll County | IL | 22.7% |
| 54 | Tazewell County | IL | 22.6% |
| 55 | Perry County | IL | 20.7% |
| 56 | Woodford County | IL | 17.8% |
| 57 | Marshall County | IL | 17.8% |
| 58 | Richland County | IL | 17.4% |
| 59 | Mercer County | IL | 17.1% |
| 60 | Jersey County | IL | 16.0% |
| 61 | Hancock County | IL | 16.0% |
| 62 | Effingham County | IL | 16.0% |
| 63 | Piatt County | IL | 15.9% |
| 64 | Fulton County | IL | 15.8% |
| 65 | Wabash County | IL | 15.2% |
| 66 | Christian County | IL | 14.1% |
| 67 | Franklin County | IL | 13.9% |
| 68 | Clay County | IL | 13.9% |
| 69 | Washington County | IL | 13.7% |
| 70 | Edgar County | IL | 13.7% |
| 71 | Lawrence County | IL | 13.7% |
| 72 | Johnson County | IL | 13.5% |
| 73 | Monroe County | IL | 13.2% |
| 74 | Menard County | IL | 13.0% |
| 75 | Montgomery County | IL | 13.0% |
| 76 | Crawford County | IL | 13.0% |
| 77 | Macoupin County | IL | 12.8% |
| 78 | Fayette County | IL | 12.8% |
| 79 | Wayne County | IL | 12.1% |
| 80 | Moultrie County | IL | 12.1% |
| 81 | Clark County | IL | 12.1% |
| 82 | White County | IL | 12.1% |
| 83 | Shelby County | IL | 11.9% |
| 84 | Mason County | IL | 11.9% |
| 85 | Pike County | IL | 10.8% |
| 86 | Jasper County | IL | 10.2% |
| 87 | Hamilton County | IL | 9.8% |
| 88 | Greene County | IL | 9.6% |
| 89 | Cumberland County | IL | 9.3% |