| Region 1 | ||||||||
| Number of Registered Voters | ||||||||
| Source: Office of the Secretary of State | ||||||||
| Updated 3/30/09 | ||||||||
| 1994 | 1996 | 1998 | 2000 | 2002 | 2004 | 2006 | 2008 | |
| Benewah | 4,630 | 5,117 | 4,849 | 5,098 | 4,746 | 5,126 | 4,970 | 5,426 |
| Bonner | 17,692 | 18,957 | 19,241 | 21,256 | 19,769 | 23,248 | 22,300 | 25,822 |
| Boundary | 4,956 | 5,665 | 5,393 | 5,853 | 5,270 | 6,167 | 5,949 | 6,446 |
| Kootenai | 48,673 | 58,570 | 54,569 | 60,824 | 58,182 | 72,471 | 68,193 | 79,228 |
| Shoshone | 8,344 | 8,499 | 7,931 | 8,701 | 7,838 | 7,363 | 6,982 | 7,166 |
| * Population 18 years and over | ||||||||
| * This data is for the general elections of the reported years. | ||||||||