Voter Registration Totals as of June 3, 2020
| County |
Constitution |
Democratic |
Libertarian |
Republican |
Unaffiliated |
Total Registered |
| Ada |
663 |
54,242 |
3,032 |
115,395 |
96,326 |
269,658 |
| Adams |
16 |
234 |
17 |
1,842 |
629 |
2,738 |
| Bannock |
142 |
5,725 |
424 |
18,933 |
18,000 |
43,224 |
| Bear Lake |
14 |
146 |
8 |
2,765 |
519 |
3,452 |
| Benewah |
31 |
546 |
33 |
3,439 |
1,414 |
5,463 |
| Bingham |
71 |
1,904 |
90 |
13,552 |
5,277 |
20,894 |
| Blaine |
21 |
3,786 |
107 |
3,440 |
6,708 |
14,062 |
| Boise |
25 |
433 |
42 |
3,403 |
1,289 |
5,192 |
| Bonner |
159 |
3,396 |
261 |
16,819 |
7,410 |
28,045 |
| Bonneville |
202 |
5,189 |
429 |
33,041 |
16,334 |
55,195 |
| Boundary |
29 |
575 |
53 |
4,653 |
1,340 |
6,650 |
| Butte |
4 |
74 |
2 |
1,161 |
227 |
1,468 |
| Camas |
5 |
63 |
4 |
510 |
170 |
752 |
| Canyon |
417 |
11,783 |
996 |
54,385 |
29,494 |
97,075 |
| Caribou |
19 |
142 |
16 |
2,989 |
646 |
3,812 |
| Cassia |
31 |
677 |
46 |
7,110 |
1,932 |
9,796 |
| Clark |
2 |
19 |
1 |
326 |
41 |
389 |
| Clearwater |
13 |
427 |
27 |
2,857 |
1,322 |
4,646 |
| Custer |
3 |
182 |
16 |
2,164 |
532 |
2,897 |
| Elmore |
49 |
1,270 |
92 |
6,928 |
2,984 |
11,323 |
| Franklin |
41 |
245 |
31 |
5,158 |
1,072 |
6,547 |
| Fremont |
31 |
348 |
21 |
5,466 |
1,132 |
6,998 |
| Gem |
53 |
824 |
58 |
7,102 |
2,190 |
10,227 |
| Gooding |
24 |
625 |
35 |
4,179 |
1,493 |
6,356 |
| Idaho |
31 |
676 |
57 |
7,722 |
1,817 |
10,303 |
| Jefferson |
41 |
509 |
63 |
10,968 |
2,592 |
14,173 |
| Jerome |
92 |
869 |
45 |
4,961 |
2,369 |
8,336 |
| Kootenai |
392 |
11,103 |
792 |
51,983 |
24,899 |
89,169 |
| Latah |
72 |
5,425 |
335 |
8,343 |
9,430 |
23,605 |
| Lemhi |
16 |
457 |
28 |
3,800 |
1,077 |
5,378 |
| Lewis |
6 |
172 |
11 |
1,404 |
521 |
2,114 |
| Lincoln |
6 |
180 |
9 |
1,532 |
476 |
2,203 |
| Madison |
101 |
809 |
190 |
13,155 |
4,077 |
18,332 |
| Minidoka |
26 |
687 |
33 |
5,221 |
2,042 |
8,009 |
| Nez Perce |
84 |
3,114 |
131 |
10,231 |
8,470 |
22,030 |
| Oneida |
9 |
129 |
24 |
2,102 |
449 |
2,713 |
| Owyhee |
29 |
486 |
36 |
3,615 |
1,193 |
5,359 |
| Payette |
54 |
1,060 |
75 |
7,430 |
2,914 |
11,533 |
| Power |
7 |
407 |
14 |
2,011 |
1,009 |
3,448 |
| Shoshone |
29 |
1,392 |
39 |
3,080 |
2,325 |
6,865 |
| Teton |
14 |
1,477 |
59 |
2,727 |
2,350 |
6,627 |
| Twin Falls |
141 |
3,951 |
286 |
21,884 |
11,083 |
37,345 |
| Valley |
15 |
1,246 |
52 |
3,878 |
2,166 |
7,357 |
| Washington |
10 |
495 |
27 |
3,975 |
1,011 |
5,518 |
| Total |
3,240 |
127,499 |
8,147 |
487,639 |
280,751 |
907,276 |