Voter Registration Totals as of October 3, 2019
| Cong. Dist. |
Total Registered |
| 1 |
456,678 |
| 2 |
407,661 |
| Total |
864,340 |
| Leg. Dist. |
Total Registered |
| 1 |
29,259 |
| 2 |
30,034 |
| 3 |
26,384 |
| 4 |
27,168 |
| 5 |
27,594 |
| 6 |
23,353 |
| 7 |
24,376 |
| 8 |
29,407 |
| 9 |
22,927 |
| 10 |
18,667 |
| 11 |
25,233 |
| 12 |
21,166 |
| 13 |
22,641 |
| 14 |
38,043 |
| 15 |
24,390 |
| 16 |
26,286 |
| 17 |
23,360 |
| 18 |
30,078 |
| 19 |
32,507 |
| 20 |
27,355 |
| 21 |
30,290 |
| 22 |
23,281 |
| 23 |
18,533 |
| 24 |
20,764 |
| 25 |
20,360 |
| 26 |
22,416 |
| 27 |
17,259 |
| 28 |
23,923 |
| 29 |
21,190 |
| 30 |
25,342 |
| 31 |
20,191 |
| 32 |
25,129 |
| 33 |
20,287 |
| 34 |
22,907 |
| 35 |
22,240 |
| Total |
864,340 |
| County |
Total Registered |
| Ada |
255,590 |
| Adams |
2,609 |
| Bannock |
41,812 |
| Bear Lake |
3,427 |
| Benewah |
5,164 |
| Bingham |
20,191 |
| Blaine |
13,441 |
| Boise |
4,835 |
| Bonner |
26,598 |
| Bonneville |
53,044 |
| Boundary |
6,279 |
| Butte |
1,480 |
| Camas |
711 |
| Canyon |
91,772 |
| Caribou |
3,649 |
| Cassia |
9,462 |
| Clark |
386 |
| Clearwater |
4,385 |
| Custer |
2,796 |
| Elmore |
10,629 |
| Franklin |
6,153 |
| Fremont |
6,710 |
| Gem |
9,667 |
| Gooding |
6,143 |
| Idaho |
9,789 |
| Jefferson |
13,664 |
| Jerome |
7,987 |
| Kootenai |
83,586 |
| Latah |
22,430 |
| Lemhi |
5,207 |
| Lewis |
1,995 |
| Lincoln |
2,121 |
| Madison |
18,531 |
| Minidoka |
7,797 |
| Nez Perce |
21,358 |
| Oneida |
2,606 |
| Owyhee |
5,077 |
| Payette |
11,005 |
| Power |
3,301 |
| Shoshone |
6,584 |
| Teton |
6,255 |
| Twin Falls |
35,964 |
| Valley |
6,902 |
| Washington |
5,248 |
| Total |
864,340 |