| 1 | Rockford city (east-northeast 1) | 18.6% |
| 2 | Roscoe village (east-northeast) | 18.6% |
| 3 | Rockford city (east-northeast 2) | 18.2% |
| 4 | Rockford city (north-northeast 1) | 17.1% |
| 5 | Rockford city (northeast 3) | 16.9% |
| 6 | Rockford city (north-northeast 2) | 16.1% |
| 7 | Cherry Valley village (north-northeast) | 15.6% |
| 8 | Rockton village (west-southwest) | 15.4% |
| 9 | Rockford city (east-southeast 2) | 15% |
| 10 | Machesney Park village (southwest 1) | 13.7% |
| 11 | Rockford city (west-southwest 2) | 13.5% |
| 12 | Loves Park city (east) | 13.2% |
| 13 | Rockford city (south 3) | 12.7% |
| 14 | Rockford city (south-southwest 1) | 12.6% |
| 15 | Roscoe village (northwest) | 12% |
| 16 | Rockford city (north-northwest 4) | 11.8% |
| 17 | Roscoe village (south-southwest) | 11.1% |
| 18 | Rockford city (east-southeast 1) | 10.9% |
| 19 | Rockford city (east-northeast 3) | 10.4% |
| 20 | Rockford city (northwest 2) | 10.2% |
| 21 | Rockford city (west 4) | 10.1% |
| 22 | Rockford city (northeast 2) | 10% |
| 23 | Winnebago village | 10% |
| 24 | Rockford city (east-southeast 4) | 9.8% |
| 25 | Pecatonica village | 9.7% |
| 26 | Rockford city (west-northwest 2) | 9.5% |
| 27 | Cherry Valley village (south-southwest) | 9.3% |
| 28 | Machesney Park village (southwest 2) | 9.2% |
| 29 | Lake Summerset CDP | 8.9% |
| 30 | Machesney Park village (north-northeast) | 8.8% |
| 31 | Rockford city (west-northwest 4) | 8.8% |
| 32 | Rockford city (east 2) | 8.5% |
| 33 | Rockford city (north-northwest 1) | 8.4% |
| 34 | Loves Park city (north) | 8.1% |
| 35 | Rockford city (east-northeast 4) | 8.1% |
| 36 | Rockford city (north 2) | 8% |
| 37 | Rockford city (west-southwest 5) | 7.7% |
| 38 | Machesney Park village (northeast) | 7.2% |
| 39 | Rockford city (northeast 1) | 7.2% |
| 40 | Rockford city (southeast 1) | 7.2% |
| 41 | Rockford city (west-northwest 1) | 7.1% |
| 42 | Rockford city (north 1) | 7% |
| 43 | Rockford city (south-southwest 2) | 6.7% |
| 44 | Rockford city (northwest 3) | 6.4% |
| 45 | Rockton village (east-northeast) | 6.3% |
| 46 | Rockford city (west 1) | 6.2% |
| 47 | Cherry Valley village (northwest) | 6.1% |
| 48 | Rockford city (northwest 1) | 6.1% |
| 49 | Rockford city (northeast 4) | 6% |
| 50 | South Beloit city (west) | 5.8% |
| 51 | Rockford city (north-northwest 6) | 5.7% |
| 52 | Rockford city (west-southwest 3) | 5.7% |
| 53 | Loves Park city (southwest) | 5.6% |
| 54 | Rockford city (north-northwest 3) | 5.4% |
| 55 | Loves Park city (southeast) | 5.2% |
| 56 | Rockford city (east 1) | 5.2% |
| 57 | Rockford city (south 1) | 4.6% |
| 58 | Rockford city (south-southeast 1) | 4.6% |
| 59 | Rockford city (south-southeast 3) | 4.1% |
| 60 | Rockford city (north-northwest 2) | 3.9% |
| 61 | Rockford city (south-southeast 4) | 3.8% |
| 62 | Rockford city (east-southeast 3) | 3.7% |
| 63 | Loves Park city (west-southwest) | 3.2% |
| 64 | Rockford city (south 2) | 3.2% |
| 65 | Loves Park city (east-northeast) | 3% |
| 66 | Rockford city (south-southwest 4) | 2.8% |
| 67 | Rockford city (south-southeast 2) | 2.7% |
| 68 | Machesney Park village (west-southwest) | 2.6% |
| 69 | Rockford city (south-southwest 5) | 2.2% |
| 70 | Rockford city (north-northwest 5) | 1.7% |
| 71 | Rockford city (south-southwest 6) | 1.7% |
| 72 | South Beloit city (east) | 1.3% |
| 73 | Rockford city (west 3) | 1.2% |
| 74 | Rockford city (southeast 2) | 1.1% |
| 75 | Loves Park city (west) | 1% |
| 76 | Rockford city (west 2) | 1% |
| 77 | Rockford city (west-northwest 3) | 0.2% |
| 78 | Rockford city (west-southwest 1) | 0% |
| 79 | Rockford city (west-southwest 4) | 0% |