| Township/Multi-Township | Factor |
| Cherry Valley | 1.0896 |
| Durand/Laona | 1.0306 |
| Harlem | 1.0860 |
| Owen | 1.0720 |
| Pecatonica/Seward | 1.0649 |
| Rockford | 1.1106 |
| Rockton | 1.0853 |
| Roscoe | 1.0766 |
| Winnebago | 1.0772 |
| Shirland/Harrison/Burritt | 1.1260 |
- Equalization is the adjustment of the median level of assessment up or down so that the tax burden is "equalized" among taxing districts.
- State law requires equalization in order to bring assessments to the level required by state law, which is 33.33% of fair cash value.
- Equalization is accomplished by the use of an Equalization Factor, which is a factor applied to all non-farm assessments.
- Equalization factors can occur at four levels:
- Neighborhood level, as applied by the Township Assessor.
- Township level, as applied by the Supervisor of Assessments.
- Township level, as applied by the Board of Review.
- County level, as applied by the Illinois Department of Revenue.
