| 1 | Glen Carbon village (southwest) | 21.6% |
| 2 | Maryville village (northwest) | 20.5% |
| 3 | Glen Carbon village (southeast) | 19.3% |
| 4 | Alton city (west-northwest) | 18.6% |
| 5 | Maryville village (northeast) | 17.7% |
| 6 | Godfrey village (north-northwest) | 16% |
| 7 | Marine village (west) | 15.8% |
| 8 | Collinsville city (east-northeast) | 15.6% |
| 9 | Holiday Shores CDP (north) | 14.6% |
| 10 | Marine village (east) | 13.8% |
| 11 | Troy city (south) | 13.5% |
| 12 | Glen Carbon village (north) | 13.4% |
| 13 | East Alton village (east-northeast) | 13.2% |
| 14 | Granite City city (south) | 13% |
| 15 | Pontoon Beach village (southeast) | 12.7% |
| 16 | Rosewood Heights CDP (northwest) | 12.5% |
| 17 | Alton city (west-southwest) | 12.1% |
| 18 | Bethalto village | 12.1% |
| 19 | Troy city (north) | 11.9% |
| 20 | Edwardsville city (east-northeast) | 11.7% |
| 21 | Godfrey village (south-southeast 2) | 11.6% |
| 22 | Moro CDP (northwest) | 11.3% |
| 23 | Godfrey village (west-southwest) | 11.2% |
| 24 | St. Jacob village (south) | 11.2% |
| 25 | Pontoon Beach village (north-northwest) | 11% |
| 26 | Pontoon Beach village (west-southwest) | 10.8% |
| 27 | Alton city (north-northeast) | 10.7% |
| 28 | Pontoon Beach village (northeast) | 10.4% |
| 29 | Highland city | 10.2% |
| 30 | Collinsville city (east) | 10% |
| 31 | Godfrey village (northeast) | 10% |
| 32 | St. Jacob village (northeast) | 9.7% |
| 33 | St. Jacob village (west-southwest) | 9.5% |
| 34 | Worden village | 9.3% |
| 35 | Wood River city | 9.2% |
| 36 | Collinsville city (west-northwest) | 9.1% |
| 37 | Holiday Shores CDP (south) | 9% |
| 38 | Alhambra village | 8.3% |
| 39 | Edwardsville city (west-southwest) | 8.1% |
| 40 | Godfrey village (south-southeast 1) | 7.9% |
| 41 | Moro CDP (east-northeast) | 7.9% |
| 42 | Maryville village (southwest) | 7.4% |
| 43 | Granite City city (southwest) | 6.8% |
| 44 | Madison city (south-southwest) | 6.8% |
| 45 | Moro CDP (south-southeast) | 6.6% |
| 46 | Rosewood Heights CDP (southeast) | 6.4% |
| 47 | Pontoon Beach village (west) | 6.3% |
| 48 | East Alton village (west-northwest) | 6% |
| 49 | Collinsville city (southwest) | 5.4% |
| 50 | Madison city (north-northeast) | 5.2% |
| 51 | South Roxana village (south) | 4.9% |
| 52 | Alton city (east-southeast) | 4.6% |
| 53 | East Alton village (northwest) | 4.2% |
| 54 | South Roxana village (north) | 3.8% |
| 55 | Granite City city (north) | 3.7% |
| 56 | Granite City city (east) | 2.9% |
| 57 | Alton city (south) | 2.8% |
| 58 | Maryville village (south) | 2.5% |
| 59 | Moro CDP (southwest) | 2.3% |
| 60 | East Alton village (southeast) | 2.1% |
| 61 | Venice city (southwest) | 1.3% |
| 62 | Venice city (northeast) | 0.6% |
| 63 | East Alton village (east-southeast) | 0% |