Voter Registration Totals as of April 6, 2020
| County |
Constitution |
Democratic |
Libertarian |
Republican |
Unaffiliated |
Total Registered |
| Ada |
672 |
53,429 |
3,057 |
106,683 |
102,926 |
266,769 |
| Adams |
15 |
230 |
17 |
1,772 |
692 |
2,726 |
| Bannock |
144 |
5,660 |
410 |
17,601 |
19,179 |
42,994 |
| Bear Lake |
14 |
146 |
10 |
2,631 |
611 |
3,412 |
| Benewah |
28 |
544 |
33 |
2,677 |
2,014 |
5,296 |
| Bingham |
71 |
1,885 |
91 |
12,759 |
5,838 |
20,644 |
| Blaine |
20 |
3,675 |
107 |
3,206 |
6,891 |
13,899 |
| Boise |
23 |
432 |
43 |
3,132 |
1,475 |
5,105 |
| Bonner |
155 |
3,357 |
255 |
15,551 |
8,351 |
27,670 |
| Bonneville |
197 |
5,102 |
421 |
30,426 |
18,274 |
54,420 |
| Boundary |
29 |
565 |
52 |
4,348 |
1,546 |
6,540 |
| Butte |
4 |
74 |
4 |
1,124 |
269 |
1,475 |
| Camas |
6 |
55 |
4 |
468 |
203 |
736 |
| Canyon |
408 |
11,345 |
979 |
49,082 |
33,280 |
95,094 |
| Caribou |
18 |
141 |
16 |
2,742 |
819 |
3,736 |
| Cassia |
31 |
675 |
45 |
6,863 |
2,123 |
9,737 |
| Clark |
2 |
18 |
1 |
318 |
50 |
389 |
| Clearwater |
12 |
416 |
26 |
2,486 |
1,591 |
4,531 |
| Custer |
5 |
191 |
17 |
2,014 |
632 |
2,859 |
| Elmore |
49 |
1,246 |
90 |
6,341 |
3,393 |
11,119 |
| Franklin |
41 |
241 |
32 |
4,767 |
1,360 |
6,441 |
| Fremont |
31 |
346 |
21 |
5,134 |
1,317 |
6,849 |
| Gem |
53 |
804 |
58 |
6,569 |
2,578 |
10,062 |
| Gooding |
23 |
617 |
34 |
3,885 |
1,721 |
6,280 |
| Idaho |
30 |
681 |
58 |
6,995 |
2,381 |
10,145 |
| Jefferson |
43 |
500 |
61 |
10,261 |
3,090 |
13,955 |
| Jerome |
90 |
857 |
45 |
4,530 |
2,701 |
8,223 |
| Kootenai |
390 |
10,951 |
782 |
48,033 |
27,838 |
87,994 |
| Latah |
69 |
5,360 |
324 |
7,748 |
9,970 |
23,471 |
| Lemhi |
16 |
449 |
27 |
3,497 |
1,330 |
5,319 |
| Lewis |
7 |
166 |
10 |
1,345 |
582 |
2,110 |
| Lincoln |
6 |
183 |
13 |
1,365 |
586 |
2,153 |
| Madison |
100 |
795 |
187 |
12,460 |
4,525 |
18,067 |
| Minidoka |
24 |
683 |
32 |
4,927 |
2,284 |
7,950 |
| Nez Perce |
84 |
2,988 |
134 |
9,140 |
9,518 |
21,864 |
| Oneida |
9 |
130 |
24 |
1,976 |
546 |
2,685 |
| Owyhee |
33 |
489 |
35 |
3,356 |
1,367 |
5,280 |
| Payette |
52 |
1,023 |
72 |
6,707 |
3,546 |
11,400 |
| Power |
9 |
403 |
13 |
1,741 |
1,213 |
3,379 |
| Shoshone |
26 |
1,389 |
39 |
2,862 |
2,515 |
6,831 |
| Teton |
15 |
1,458 |
59 |
2,424 |
2,592 |
6,548 |
| Twin Falls |
137 |
3,890 |
286 |
20,423 |
12,201 |
36,937 |
| Valley |
15 |
1,213 |
52 |
3,490 |
2,409 |
7,179 |
| Washington |
12 |
489 |
25 |
3,703 |
1,212 |
5,441 |
| Total |
3,218 |
125,291 |
8,101 |
449,562 |
309,539 |
895,714 |