| illinois state archives databases | 0.36 | 0.5 | 3651 | 33 | 7 |
| illinois state archives online | 1.69 | 0.9 | 1205 | 30 | 11 |
| state of illinois archives | 0.4 | 1 | 3169 | 26 | 17 |
| illinois state archives death database | 1.31 | 0.2 | 4811 | 38 | 12 |
| state of illinois genealogy databases | 1.52 | 0.1 | 5446 | 37 | 92 |
| illinois state university archives | 1.62 | 1 | 179 | 34 | 10 |
| illinois state archives civil war database | 0.65 | 0.1 | 5188 | 42 | 54 |
| illinois state library database | 0.34 | 0.7 | 6593 | 31 | 82 |
| illinois state historical society archives | 0.61 | 0.7 | 6251 | 42 | 45 |
| illinois state archives military records | 0.16 | 1 | 3177 | 40 | 14 |
| illinois state archives death records | 0.94 | 0.5 | 5148 | 37 | 72 |
| illinois secretary of state databases | 0.4 | 0.5 | 179 | 37 | 56 |
| illinois secretary of state archives | 0.66 | 0.4 | 4000 | 36 | 82 |
| illinois state journal archives | 0.37 | 1 | 7006 | 31 | 99 |
| state of illinois database | 0.51 | 0.6 | 9547 | 26 | 84 |
| illinois digital archives online | 1.57 | 0.8 | 42 | 32 | 42 |
| illinois secretary of state digital archives | 1.45 | 0.3 | 3876 | 44 | 33 |
| illinois state archives marriage database | 0.85 | 0.4 | 1126 | 41 | 21 |
| illinois state archives death | 0.5 | 0.6 | 3893 | 29 | 33 |
| illinois state archives death index | 1.28 | 0.1 | 7194 | 35 | 13 |
| illinois state university library database | 0.03 | 0.8 | 7980 | 42 | 8 |
| illinois state university database | 1.11 | 0.6 | 1056 | 34 | 88 |
