Voter Registration Totals as of March 1, 2019
| Cong. Dist. |
Total Registered |
| 1 |
458,370 |
| 2 |
409,048 |
| Total |
867,418 |
| Leg. Dist. |
Total Registered |
| 1 |
28,677 |
| 2 |
29,316 |
| 3 |
25,700 |
| 4 |
26,807 |
| 5 |
27,628 |
| 6 |
23,240 |
| 7 |
24,064 |
| 8 |
29,142 |
| 9 |
23,462 |
| 10 |
19,495 |
| 11 |
25,659 |
| 12 |
21,880 |
| 13 |
23,443 |
| 14 |
37,932 |
| 15 |
24,946 |
| 16 |
26,948 |
| 17 |
24,230 |
| 18 |
30,802 |
| 19 |
33,154 |
| 20 |
27,666 |
| 21 |
30,701 |
| 22 |
23,547 |
| 23 |
18,442 |
| 24 |
20,482 |
| 25 |
20,214 |
| 26 |
22,712 |
| 27 |
17,037 |
| 28 |
23,506 |
| 29 |
20,855 |
| 30 |
25,343 |
| 31 |
20,275 |
| 32 |
24,889 |
| 33 |
20,249 |
| 34 |
22,808 |
| 35 |
22,167 |
| Total |
867,418 |
| County |
Total Registered |
| Ada |
259,926 |
| Adams |
2,593 |
| Bannock |
41,089 |
| Bear Lake |
3,310 |
| Benewah |
5,026 |
| Bingham |
20,275 |
| Blaine |
13,770 |
| Boise |
4,765 |
| Bonner |
26,054 |
| Bonneville |
52,944 |
| Boundary |
6,187 |
| Butte |
1,493 |
| Camas |
718 |
| Canyon |
94,631 |
| Caribou |
3,703 |
| Cassia |
9,349 |
| Clark |
374 |
| Clearwater |
4,355 |
| Custer |
2,797 |
| Elmore |
10,493 |
| Franklin |
6,204 |
| Fremont |
6,721 |
| Gem |
9,549 |
| Gooding |
6,118 |
| Idaho |
9,712 |
| Jefferson |
13,579 |
| Jerome |
7,959 |
| Kootenai |
81,823 |
| Latah |
22,602 |
| Lemhi |
5,066 |
| Lewis |
1,971 |
| Lincoln |
2,106 |
| Madison |
18,439 |
| Minidoka |
7,688 |
| Nez Perce |
21,269 |
| Oneida |
2,457 |
| Owyhee |
5,143 |
| Payette |
11,489 |
| Power |
3,272 |
| Shoshone |
6,433 |
| Teton |
6,232 |
| Twin Falls |
35,543 |
| Valley |
6,965 |
| Washington |
5,226 |
| Total |
867,418 |