Births by Age of Parents by County,
Oregon Residents, Polk County, 2005-2007 | ? | Mother's Age |
| <15 | 15 | 16 | 17 | 18 | 19 | 20-24 | 25+ | N.S. | Total |
| Father's Age | Total | 0 | 8 | 33 | 36 | 56 | 94 | 653 | 1609 | 0 | 2489 |
| <15 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 15 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 16 | 0 | 1 | 5 | 1 | 1 | 0 | 0 | 1 | 0 | 9 |
| 17 | 0 | 2 | 1 | 1 | 3 | 0 | 1 | 0 | 0 | 8 |
| 18 | 0 | 0 | 3 | 8 | 5 | 5 | 6 | 0 | 0 | 27 |
| 19 | 0 | 0 | 5 | 2 | 8 | 9 | 11 | 0 | 0 | 35 |
| 20 | 0 | 0 | 2 | 3 | 6 | 9 | 30 | 3 | 0 | 53 |
| 21 | 0 | 0 | 1 | 4 | 6 | 16 | 43 | 5 | 0 | 75 |
| 22 | 0 | 0 | 2 | 3 | 4 | 9 | 65 | 11 | 0 | 94 |
| 23 | 0 | 0 | 1 | 1 | 0 | 6 | 67 | 10 | 0 | 85 |
| 24 | 0 | 0 | 1 | 0 | 1 | 7 | 66 | 28 | 0 | 103 |
| 25+ | 0 | 0 | 1 | 1 | 8 | 9 | 271 | 1466 | 0 | 1756 |
| N.S. | 0 | 4 | 10 | 12 | 14 | 24 | 93 | 85 | 0 | 242 |