Voter Registration Totals as of March 10, 2020
| County |
Libertarian |
Constitution |
Democratic |
Republican |
Unaffiliated |
Total Registered |
| Ada |
3,192 |
697 |
51,011 |
106,641 |
101,138 |
262,679 |
| Adams |
14 |
16 |
206 |
1,734 |
703 |
2,673 |
| Bannock |
433 |
149 |
5,365 |
17,405 |
19,108 |
42,460 |
| Bear Lake |
12 |
16 |
125 |
2,637 |
629 |
3,419 |
| Benewah |
34 |
28 |
531 |
2,528 |
2,106 |
5,227 |
| Bingham |
98 |
76 |
1,782 |
12,625 |
5,848 |
20,429 |
| Blaine |
116 |
20 |
3,411 |
3,314 |
6,928 |
13,789 |
| Boise |
45 |
25 |
376 |
3,023 |
1,476 |
4,945 |
| Bonner |
276 |
166 |
3,054 |
15,335 |
8,448 |
27,279 |
| Bonneville |
449 |
198 |
4,503 |
30,087 |
18,399 |
53,636 |
| Boundary |
58 |
30 |
489 |
4,273 |
1,580 |
6,430 |
| Butte |
4 |
4 |
72 |
1,126 |
286 |
1,492 |
| Camas |
4 |
6 |
40 |
467 |
215 |
732 |
| Canyon |
955 |
411 |
11,128 |
48,547 |
33,182 |
94,225 |
| Caribou |
16 |
20 |
121 |
2,678 |
833 |
3,668 |
| Cassia |
49 |
35 |
579 |
6,802 |
2,153 |
9,618 |
| Clark |
2 |
2 |
14 |
310 |
56 |
384 |
| Clearwater |
29 |
14 |
370 |
2,346 |
1,690 |
4,449 |
| Custer |
19 |
6 |
179 |
1,976 |
652 |
2,832 |
| Elmore |
93 |
50 |
1,100 |
6,237 |
3,473 |
10,953 |
| Franklin |
35 |
45 |
195 |
4,664 |
1,380 |
6,319 |
| Fremont |
25 |
30 |
321 |
5,051 |
1,355 |
6,782 |
| Gem |
61 |
60 |
661 |
6,448 |
2,715 |
9,945 |
| Gooding |
35 |
24 |
567 |
3,814 |
1,788 |
6,228 |
| Idaho |
59 |
32 |
621 |
6,738 |
2,511 |
9,961 |
| Jefferson |
62 |
49 |
480 |
10,125 |
3,102 |
13,818 |
| Jerome |
47 |
89 |
764 |
4,480 |
2,715 |
8,095 |
| Kootenai |
829 |
399 |
9,957 |
46,602 |
28,352 |
86,139 |
| Latah |
333 |
73 |
4,993 |
7,638 |
10,108 |
23,145 |
| Lemhi |
36 |
16 |
408 |
3,386 |
1,427 |
5,273 |
| Lewis |
11 |
7 |
154 |
1,298 |
585 |
2,055 |
| Lincoln |
14 |
7 |
171 |
1,303 |
595 |
2,090 |
| Madison |
186 |
100 |
659 |
12,218 |
4,433 |
17,596 |
| Minidoka |
39 |
28 |
637 |
4,855 |
2,329 |
7,888 |
| Nez Perce |
148 |
79 |
2,787 |
8,929 |
9,687 |
21,630 |
| Oneida |
24 |
10 |
110 |
1,939 |
561 |
2,644 |
| Owyhee |
40 |
32 |
445 |
3,250 |
1,433 |
5,200 |
| Payette |
69 |
50 |
972 |
6,616 |
3,592 |
11,299 |
| Power |
13 |
10 |
389 |
1,705 |
1,208 |
3,325 |
| Shoshone |
37 |
26 |
1,341 |
2,597 |
2,700 |
6,701 |
| Teton |
63 |
16 |
1,386 |
2,435 |
2,534 |
6,434 |
| Twin Falls |
316 |
149 |
3,503 |
20,120 |
12,360 |
36,448 |
| Valley |
56 |
18 |
1,104 |
3,462 |
2,416 |
7,056 |
| Washington |
28 |
12 |
424 |
3,605 |
1,275 |
5,344 |
| Total |
8,464 |
3,330 |
117,505 |
443,369 |
310,064 |
882,732 |