| Region 1 | ||||||||||||
| Population Age by County, 2000 | ||||||||||||
| Source: U.S. Census Bureau, Census 2000 | ||||||||||||
| Age in years | 0-9 | 10-14 | 15-19 | 20-24 | 25-34 | 35-44 | 45-54 | 55-59 | 60-64 | 65-74 | 75-84 | 85+ |
| Benewah | 1258 | 737 | 702 | 394 | 977 | 1356 | 1380 | 583 | 479 | 753 | 384 | 168 |
| Bonner | 4486 | 3051 | 2765 | 1557 | 3532 | 5815 | 6602 | 2313 | 1879 | 2806 | 1545 | 484 |
| Boundary | 1427 | 867 | 835 | 429 | 994 | 1415 | 1625 | 534 | 424 | 788 | 381 | 152 |
| Kootenai | 15701 | 8600 | 8263 | 6357 | 13653 | 16817 | 15774 | 5659 | 4516 | 7127 | 4609 | 1609 |
| Shoshone | 1658 | 914 | 888 | 619 | 1419 | 2098 | 2119 | 845 | 811 | 1253 | 870 | 277 |