Voter Registration Totals as of April 2, 2019
| Cong. Dist. |
Total Registered |
| 1 |
450,338 |
| 2 |
404,182 |
| Total |
854,520 |
| Leg. Dist. |
Total Registered |
| 1 |
28,914 |
| 2 |
29,470 |
| 3 |
25,796 |
| 4 |
26,800 |
| 5 |
27,643 |
| 6 |
23,240 |
| 7 |
24,094 |
| 8 |
29,157 |
| 9 |
22,801 |
| 10 |
18,397 |
| 11 |
24,843 |
| 12 |
20,896 |
| 13 |
22,354 |
| 14 |
37,013 |
| 15 |
24,152 |
| 16 |
25,974 |
| 17 |
23,065 |
| 18 |
29,726 |
| 19 |
32,044 |
| 20 |
26,873 |
| 21 |
29,800 |
| 22 |
22,803 |
| 23 |
18,450 |
| 24 |
20,496 |
| 25 |
20,258 |
| 26 |
22,237 |
| 27 |
17,178 |
| 28 |
23,529 |
| 29 |
20,867 |
| 30 |
25,308 |
| 31 |
20,039 |
| 32 |
25,043 |
| 33 |
20,222 |
| 34 |
22,851 |
| 35 |
22,187 |
| Total |
854,520 |
| County |
Total Registered |
| Ada |
251,450 |
| Adams |
2,598 |
| Bannock |
41,112 |
| Bear Lake |
3,439 |
| Benewah |
5,052 |
| Bingham |
20,039 |
| Blaine |
13,301 |
| Boise |
4,789 |
| Bonner |
26,265 |
| Bonneville |
52,887 |
| Boundary |
6,230 |
| Butte |
1,491 |
| Camas |
713 |
| Canyon |
90,485 |
| Caribou |
3,712 |
| Cassia |
9,448 |
| Clark |
397 |
| Clearwater |
4,360 |
| Custer |
2,808 |
| Elmore |
10,500 |
| Franklin |
6,170 |
| Fremont |
6,731 |
| Gem |
9,551 |
| Gooding |
6,120 |
| Idaho |
9,722 |
| Jefferson |
13,568 |
| Jerome |
7,976 |
| Kootenai |
82,066 |
| Latah |
22,591 |
| Lemhi |
5,206 |
| Lewis |
1,986 |
| Lincoln |
2,103 |
| Madison |
18,478 |
| Minidoka |
7,730 |
| Nez Perce |
21,254 |
| Oneida |
2,508 |
| Owyhee |
5,146 |
| Payette |
10,985 |
| Power |
3,284 |
| Shoshone |
6,431 |
| Teton |
6,230 |
| Twin Falls |
35,582 |
| Valley |
6,803 |
| Washington |
5,223 |
| Total |
854,520 |