| 1 | Kennewick city (east-southeast 3) | 30% |
| 2 | Finley CDP (west-southwest) | 28.4% |
| 3 | Finley CDP (east-northeast 2) | 26.4% |
| 4 | Finley CDP (east-northeast 3) | 23.5% |
| 5 | Benton City city (northwest) | 22.7% |
| 6 | Kennewick city (south-southeast) | 20.5% |
| 7 | Finley CDP (east-northeast 1) | 20% |
| 8 | Kennewick city (north-northeast) | 17.7% |
| 9 | Benton City city (south-southwest) | 17.4% |
| 10 | Kennewick city (east-northeast) | 17.2% |
| 11 | Kennewick city (east-southeast 1) | 17.1% |
| 12 | West Richland city (northwest) | 16.8% |
| 13 | Finley CDP (east-southeast 1) | 16% |
| 14 | Benton City city (east-southeast) | 14.7% |
| 15 | Finley CDP (east-southeast 2) | 13.5% |
| 16 | Prosser city (south-southeast) | 13.3% |
| 17 | Finley CDP (northwest) | 13.2% |
| 18 | Richland city (south-southwest) | 12.2% |
| 19 | Kennewick city (east-southeast 2) | 10.9% |
| 20 | Kennewick city (west-northwest) | 9.4% |
| 21 | West Richland city (east-northeast) | 8.5% |
| 22 | Kennewick city (west) | 8.4% |
| 23 | Kennewick city (west-southwest) | 8.4% |
| 24 | Richland city (west) | 8.2% |
| 25 | Finley CDP (west-northwest) | 8.1% |
| 26 | Finley CDP (south-southeast) | 8% |
| 27 | West Richland city (east-southeast) | 7.5% |
| 28 | Richland city (southeast 2) | 7.4% |
| 29 | West Richland city (northeast) | 6.9% |
| 30 | Kennewick city (northwest) | 6.8% |
| 31 | Richland city (north-northeast 1) | 6.8% |
| 32 | Prosser city (north-northwest) | 6.6% |
| 33 | Richland city (south) | 6.5% |
| 34 | Kennewick city (north-northwest) | 6.4% |
| 35 | Finley CDP (east) | 6.1% |
| 36 | Richland city (southeast 1) | 5.8% |
| 37 | West Richland city (southwest 1) | 5.8% |
| 38 | West Richland city (south) | 5.6% |
| 39 | Benton City city (south-southeast) | 4.6% |
| 40 | Richland city (north-northeast 2) | 4.5% |
| 41 | West Richland city (west) | 3.9% |
| 42 | West Richland city (southwest 2) | 3.8% |
| 43 | Richland city (north-northwest) | 3.2% |
| 44 | Richland city (northwest) | 2.2% |