| 1 | Maryville village (southwest) | 8.9% |
| 2 | Pontoon Beach village (northeast) | 6.1% |
| 3 | Pontoon Beach village (southeast) | 5.5% |
| 4 | St. Jacob village (south) | 5.3% |
| 5 | Maryville village (northwest) | 4.7% |
| 6 | South Roxana village (north) | 4.7% |
| 7 | Alton city (north-northeast) | 4.5% |
| 8 | Collinsville city (west-northwest) | 4.4% |
| 9 | Madison city (south-southwest) | 4.3% |
| 10 | Pontoon Beach village (north-northwest) | 4.3% |
| 11 | Granite City city (east) | 4.2% |
| 12 | St. Jacob village (northeast) | 4.1% |
| 13 | Collinsville city (southwest) | 3.8% |
| 14 | Granite City city (south) | 3.5% |
| 15 | Highland city | 3.4% |
| 16 | Alton city (west-northwest) | 3.3% |
| 17 | Edwardsville city (east-northeast) | 3.2% |
| 18 | Marine village (west) | 3.2% |
| 19 | Godfrey village (south-southeast 1) | 3.1% |
| 20 | Maryville village (northeast) | 3.1% |
| 21 | Glen Carbon village (southeast) | 2.9% |
| 22 | Madison city (north-northeast) | 2.7% |
| 23 | East Alton village (west-northwest) | 2.6% |
| 24 | Edwardsville city (west-southwest) | 2.6% |
| 25 | Pontoon Beach village (west-southwest) | 2.5% |
| 26 | Venice city (northeast) | 2.5% |
| 27 | East Alton village (east-southeast) | 2.4% |
| 28 | East Alton village (northwest) | 2.4% |
| 29 | Holiday Shores CDP (north) | 2.1% |
| 30 | Glen Carbon village (north) | 2% |
| 31 | Granite City city (southwest) | 1.9% |
| 32 | South Roxana village (south) | 1.9% |
| 33 | Alton city (south) | 1.7% |
| 34 | Glen Carbon village (southwest) | 1.7% |
| 35 | Collinsville city (east) | 1.6% |
| 36 | Granite City city (north) | 1.5% |
| 37 | Troy city (north) | 1.5% |
| 38 | Alhambra village | 1.3% |
| 39 | Godfrey village (south-southeast 2) | 1.3% |
| 40 | Collinsville city (east-northeast) | 1.2% |
| 41 | Godfrey village (west-southwest) | 1.1% |
| 42 | Holiday Shores CDP (south) | 1.1% |
| 43 | Marine village (east) | 1.1% |
| 44 | Moro CDP (southwest) | 1.1% |
| 45 | Troy city (south) | 1.1% |
| 46 | Godfrey village (north-northwest) | 1% |
| 47 | Rosewood Heights CDP (southeast) | 1% |
| 48 | St. Jacob village (west-southwest) | 1% |
| 49 | Pontoon Beach village (west) | 0.9% |
| 50 | Alton city (west-southwest) | 0.8% |
| 51 | Maryville village (south) | 0.8% |
| 52 | Alton city (east-southeast) | 0.6% |
| 53 | Moro CDP (northwest) | 0.6% |
| 54 | East Alton village (east-northeast) | 0.5% |
| 55 | Godfrey village (northeast) | 0.4% |
| 56 | Venice city (southwest) | 0.4% |
| 57 | Worden village | 0.4% |
| 58 | Moro CDP (south-southeast) | 0.2% |
| 59 | Bethalto village | 0.1% |
| 60 | East Alton village (southeast) | 0% |
| 61 | Moro CDP (east-northeast) | 0% |
| 62 | Rosewood Heights CDP (northwest) | 0% |
| 63 | Wood River city | 0% |