| 1 | Pontoon Beach village (southeast) | 22.5% |
| 2 | Maryville village (southwest) | 14.6% |
| 3 | Madison city (south-southwest) | 13.2% |
| 4 | Granite City city (south) | 11% |
| 5 | Collinsville city (east) | 10.6% |
| 6 | Pontoon Beach village (north-northwest) | 10.6% |
| 7 | Collinsville city (southwest) | 9.7% |
| 8 | Pontoon Beach village (northeast) | 9.7% |
| 9 | Maryville village (northwest) | 9% |
| 10 | Collinsville city (west-northwest) | 8.9% |
| 11 | Granite City city (north) | 7.6% |
| 12 | Edwardsville city (west-southwest) | 7.1% |
| 13 | Holiday Shores CDP (north) | 7% |
| 14 | Granite City city (southwest) | 6.6% |
| 15 | Madison city (north-northeast) | 5.8% |
| 16 | Glen Carbon village (southwest) | 5.7% |
| 17 | East Alton village (east-southeast) | 5.6% |
| 18 | South Roxana village (north) | 5.4% |
| 19 | Pontoon Beach village (west-southwest) | 5.2% |
| 20 | Granite City city (east) | 5.1% |
| 21 | Godfrey village (south-southeast 2) | 4.7% |
| 22 | Maryville village (south) | 4.7% |
| 23 | St. Jacob village (south) | 4.7% |
| 24 | South Roxana village (south) | 4.5% |
| 25 | Highland city | 4.3% |
| 26 | Glen Carbon village (north) | 4.2% |
| 27 | Godfrey village (south-southeast 1) | 4.2% |
| 28 | Troy city (north) | 3.9% |
| 29 | Pontoon Beach village (west) | 3.5% |
| 30 | East Alton village (west-northwest) | 3.2% |
| 31 | St. Jacob village (northeast) | 3% |
| 32 | Alton city (south) | 2.8% |
| 33 | Edwardsville city (east-northeast) | 2.7% |
| 34 | Rosewood Heights CDP (northwest) | 2.7% |
| 35 | Troy city (south) | 2.7% |
| 36 | Alton city (east-southeast) | 2.6% |
| 37 | East Alton village (east-northeast) | 2.6% |
| 38 | Godfrey village (west-southwest) | 2.5% |
| 39 | Moro CDP (southwest) | 2.5% |
| 40 | Godfrey village (north-northwest) | 2% |
| 41 | Maryville village (northeast) | 2% |
| 42 | Alton city (north-northeast) | 1.9% |
| 43 | Marine village (east) | 1.8% |
| 44 | East Alton village (northwest) | 1.7% |
| 45 | Venice city (southwest) | 1.6% |
| 46 | Alhambra village | 1.4% |
| 47 | Alton city (west-northwest) | 1.2% |
| 48 | Marine village (west) | 1.2% |
| 49 | Moro CDP (northwest) | 1.1% |
| 50 | St. Jacob village (west-southwest) | 1% |
| 51 | Collinsville city (east-northeast) | 0.9% |
| 52 | Glen Carbon village (southeast) | 0.9% |
| 53 | Alton city (west-southwest) | 0.8% |
| 54 | Rosewood Heights CDP (southeast) | 0.8% |
| 55 | Godfrey village (northeast) | 0.5% |
| 56 | Holiday Shores CDP (south) | 0.5% |
| 57 | Bethalto village | 0.4% |
| 58 | East Alton village (southeast) | 0.4% |
| 59 | Wood River city | 0.4% |
| 60 | Venice city (northeast) | 0.3% |
| 61 | Worden village | 0.1% |
| 62 | Moro CDP (east-northeast) | 0% |
| 63 | Moro CDP (south-southeast) | 0% |