Illinois counties ranked by enrollment-weighted state-assessment proficiency across the county. Counties need at least 3 schools and 1,000 students to qualify. The median ranked county is at 40.3%. Showing ranks 51 to 88.
| # | County | State | % Proficient |
|---|---|---|---|
| 51 | LaSalle County | IL | 39.0% |
| 52 | Hancock County | IL | 38.9% |
| 53 | Morgan County | IL | 38.9% |
| 54 | Sangamon County | IL | 38.9% |
| 55 | Adams County | IL | 38.7% |
| 56 | Christian County | IL | 38.7% |
| 57 | Kane County | IL | 38.5% |
| 58 | Fulton County | IL | 38.2% |
| 59 | Lee County | IL | 38.1% |
| 60 | Champaign County | IL | 37.8% |
| 61 | Livingston County | IL | 37.8% |
| 62 | Peoria County | IL | 37.7% |
| 63 | De Witt County | IL | 37.6% |
| 64 | DeKalb County | IL | 37.6% |
| 65 | Mason County | IL | 37.6% |
| 66 | Crawford County | IL | 37.4% |
| 67 | Franklin County | IL | 37.1% |
| 68 | Coles County | IL | 37.0% |
| 69 | Lawrence County | IL | 36.9% |
| 70 | Randolph County | IL | 36.8% |
| 71 | Cook County | IL | 36.3% |
| 72 | Marion County | IL | 36.0% |
| 73 | Kankakee County | IL | 35.8% |
| 74 | Warren County | IL | 35.7% |
| 75 | Knox County | IL | 35.5% |
| 76 | Jackson County | IL | 34.9% |
| 77 | McDonough County | IL | 34.3% |
| 78 | Saline County | IL | 34.0% |
| 79 | Stephenson County | IL | 33.8% |
| 80 | Boone County | IL | 33.4% |
| 81 | Jefferson County | IL | 32.4% |
| 82 | Pike County | IL | 31.7% |
| 83 | Winnebago County | IL | 31.7% |
| 84 | Greene County | IL | 31.6% |
| 85 | Rock Island County | IL | 30.2% |
| 86 | Macon County | IL | 28.7% |
| 87 | Vermilion County | IL | 24.8% |
| 88 | Cass County | IL | 23.0% |