Voter Registration Totals as of February 27, 2020
| County |
Constitution |
Democratic |
Libertarian |
Republican |
Unaffiliated |
Total Registered |
| Ada |
701 |
50,459 |
3,228 |
106,986 |
101,031 |
262,405 |
| Adams |
16 |
197 |
14 |
1,732 |
705 |
2,664 |
| Bannock |
150 |
5,288 |
434 |
17,421 |
19,080 |
42,373 |
| Bear Lake |
16 |
126 |
12 |
2,640 |
627 |
3,421 |
| Benewah |
28 |
533 |
35 |
2,529 |
2,103 |
5,228 |
| Bingham |
77 |
1,778 |
98 |
12,627 |
5,845 |
20,425 |
| Blaine |
20 |
3,371 |
117 |
3,330 |
6,918 |
13,756 |
| Boise |
25 |
376 |
45 |
3,015 |
1,477 |
4,938 |
| Bonner |
167 |
3,013 |
278 |
15,351 |
8,440 |
27,249 |
| Bonneville |
200 |
4,469 |
451 |
30,159 |
18,398 |
53,677 |
| Boundary |
30 |
466 |
58 |
4,264 |
1,585 |
6,403 |
| Butte |
4 |
72 |
4 |
1,126 |
286 |
1,492 |
| Camas |
6 |
39 |
4 |
465 |
217 |
731 |
| Canyon |
415 |
11,013 |
959 |
48,484 |
33,247 |
94,118 |
| Caribou |
20 |
121 |
16 |
2,674 |
834 |
3,665 |
| Cassia |
34 |
549 |
49 |
6,807 |
2,163 |
9,602 |
| Clark |
2 |
14 |
2 |
310 |
56 |
384 |
| Clearwater |
14 |
370 |
29 |
2,338 |
1,698 |
4,449 |
| Custer |
6 |
174 |
19 |
1,974 |
653 |
2,826 |
| Elmore |
50 |
1,090 |
93 |
6,230 |
3,475 |
10,938 |
| Franklin |
45 |
191 |
35 |
4,666 |
1,383 |
6,320 |
| Fremont |
30 |
314 |
25 |
5,052 |
1,360 |
6,781 |
| Gem |
60 |
646 |
62 |
6,444 |
2,722 |
9,934 |
| Gooding |
24 |
565 |
35 |
3,816 |
1,790 |
6,230 |
| Idaho |
32 |
615 |
59 |
6,722 |
2,512 |
9,940 |
| Jefferson |
49 |
475 |
61 |
10,108 |
3,106 |
13,799 |
| Jerome |
89 |
762 |
49 |
4,486 |
2,714 |
8,100 |
| Kootenai |
398 |
9,818 |
832 |
46,570 |
28,421 |
86,039 |
| Latah |
75 |
4,943 |
338 |
7,652 |
10,109 |
23,117 |
| Lemhi |
16 |
404 |
36 |
3,385 |
1,425 |
5,266 |
| Lewis |
7 |
154 |
11 |
1,300 |
586 |
2,058 |
| Lincoln |
7 |
173 |
14 |
1,297 |
599 |
2,090 |
| Madison |
97 |
647 |
187 |
12,227 |
4,427 |
17,585 |
| Minidoka |
27 |
632 |
39 |
4,860 |
2,327 |
7,885 |
| Nez Perce |
79 |
2,757 |
149 |
8,906 |
9,714 |
21,605 |
| Oneida |
10 |
105 |
24 |
1,942 |
565 |
2,646 |
| Owyhee |
32 |
445 |
40 |
3,249 |
1,435 |
5,201 |
| Payette |
50 |
971 |
69 |
6,610 |
3,589 |
11,289 |
| Power |
9 |
383 |
13 |
1,706 |
1,204 |
3,315 |
| Shoshone |
26 |
1,334 |
37 |
2,594 |
2,705 |
6,696 |
| Teton |
16 |
1,374 |
63 |
2,438 |
2,534 |
6,425 |
| Twin Falls |
151 |
3,479 |
317 |
20,096 |
12,372 |
36,415 |
| Valley |
18 |
1,085 |
57 |
3,471 |
2,414 |
7,045 |
| Washington |
12 |
414 |
29 |
3,610 |
1,279 |
5,344 |
| Total |
3,340 |
116,204 |
8,526 |
443,669 |
310,130 |
881,869 |