| 1 | Cedar Rapids city (southeast 2) | 4.2% |
| 2 | Marion city (west) | 3.4% |
| 3 | Cedar Rapids city (south 2) | 2.9% |
| 4 | Marion city (southwest) | 2.8% |
| 5 | Cedar Rapids city (east 3) | 2.6% |
| 6 | Cedar Rapids city (northeast 1) | 2.5% |
| 7 | Cedar Rapids city (east 2) | 2.2% |
| 8 | Cedar Rapids city (southeast 3) | 2% |
| 9 | Mount Vernon city (south) | 1.9% |
| 10 | Cedar Rapids city (north-northeast 6) | 1.6% |
| 11 | Cedar Rapids city (southwest 1) | 1.4% |
| 12 | Cedar Rapids city (south 4) | 1.1% |
| 13 | Hiawatha city (east-southeast) | 1.1% |
| 14 | Marion city (south) | 1% |
| 15 | Cedar Rapids city (southwest 5) | 0.9% |
| 16 | Hiawatha city (west-northwest) | 0.9% |
| 17 | Mount Vernon city (north) | 0.7% |
| 18 | Cedar Rapids city (south 3) | 0.6% |
| 19 | Cedar Rapids city (west-northwest) | 0.6% |
| 20 | Cedar Rapids city (east-northeast 1) | 0.5% |
| 21 | Cedar Rapids city (south 5) | 0.5% |
| 22 | Cedar Rapids city (southeast 1) | 0.3% |
| 23 | Cedar Rapids city (southwest 4) | 0.3% |
| 24 | Cedar Rapids city (west 1) | 0.3% |
| 25 | Cedar Rapids city (north-northwest) | 0.2% |
| 26 | Cedar Rapids city (southwest 3) | 0.2% |
| 27 | Springville city | 0.2% |
| 28 | Cedar Rapids city (southwest 2) | 0.1% |
| 29 | Cedar Rapids city (west 2) | 0.1% |
| 30 | Cedar Rapids city (east 1) | 0% |
| 31 | Cedar Rapids city (east-northeast 2) | 0% |
| 32 | Cedar Rapids city (east-southeast) | 0% |
| 33 | Cedar Rapids city (north-northeast 1) | 0% |
| 34 | Cedar Rapids city (north-northeast 2) | 0% |
| 35 | Cedar Rapids city (north-northeast 3) | 0% |
| 36 | Cedar Rapids city (north-northeast 4) | 0% |
| 37 | Cedar Rapids city (north-northeast 5) | 0% |
| 38 | Cedar Rapids city (northeast 2) | 0% |
| 39 | Cedar Rapids city (northwest 1) | 0% |
| 40 | Cedar Rapids city (northwest 2) | 0% |
| 41 | Cedar Rapids city (south 1) | 0% |
| 42 | Cedar Rapids city (west-southwest 1) | 0% |
| 43 | Cedar Rapids city (west-southwest 2) | 0% |
| 44 | Cedar Rapids city (west-southwest 3) | 0% |
| 45 | Center Point city | 0% |
| 46 | Central City city | 0% |
| 47 | Coggon city | 0% |
| 48 | Marion city (east) | 0% |
| 49 | Marion city (east-northeast) | 0% |
| 50 | Marion city (north) | 0% |
| 51 | Marion city (north-northwest) | 0% |
| 52 | Marion city (northwest) | 0% |
| 53 | Marion city (south-southeast) | 0% |
| 54 | Robins city | 0% |