Voter Registration Totals as of January 24, 2020
| County |
Constitution |
Democratic |
Libertarian |
Republican |
Unaffiliated |
Total Registered |
| Ada |
691 |
48,888 |
3,182 |
106,495 |
100,390 |
259,646 |
| Adams |
16 |
190 |
14 |
1,714 |
701 |
2,635 |
| Bannock |
148 |
5,142 |
429 |
17,358 |
19,002 |
42,079 |
| Bear Lake |
17 |
126 |
14 |
2,635 |
632 |
3,424 |
| Benewah |
29 |
532 |
35 |
2,478 |
2,105 |
5,179 |
| Bingham |
78 |
1,760 |
95 |
12,577 |
5,804 |
20,314 |
| Blaine |
18 |
3,271 |
119 |
3,320 |
6,871 |
13,599 |
| Boise |
25 |
355 |
44 |
2,986 |
1,455 |
4,865 |
| Bonner |
160 |
2,874 |
276 |
15,259 |
8,398 |
26,967 |
| Bonneville |
195 |
4,316 |
443 |
29,938 |
18,268 |
53,160 |
| Boundary |
30 |
446 |
58 |
4,213 |
1,579 |
6,326 |
| Butte |
4 |
69 |
4 |
1,131 |
287 |
1,495 |
| Camas |
6 |
36 |
5 |
461 |
221 |
729 |
| Canyon |
411 |
10,628 |
944 |
47,770 |
33,063 |
92,816 |
| Caribou |
19 |
115 |
15 |
2,662 |
837 |
3,648 |
| Cassia |
33 |
528 |
48 |
6,778 |
2,158 |
9,545 |
| Clark |
2 |
14 |
2 |
310 |
58 |
386 |
| Clearwater |
14 |
371 |
30 |
2,284 |
1,714 |
4,413 |
| Custer |
5 |
166 |
19 |
1,973 |
660 |
2,823 |
| Elmore |
48 |
1,041 |
93 |
6,157 |
3,483 |
10,822 |
| Franklin |
45 |
178 |
35 |
4,636 |
1,371 |
6,265 |
| Fremont |
29 |
298 |
24 |
5,041 |
1,359 |
6,751 |
| Gem |
59 |
627 |
63 |
6,374 |
2,716 |
9,839 |
| Gooding |
21 |
561 |
34 |
3,794 |
1,797 |
6,207 |
| Idaho |
31 |
590 |
62 |
6,682 |
2,513 |
9,878 |
| Jefferson |
51 |
455 |
60 |
10,050 |
3,075 |
13,691 |
| Jerome |
86 |
746 |
48 |
4,443 |
2,708 |
8,031 |
| Kootenai |
385 |
9,327 |
813 |
45,739 |
28,378 |
84,642 |
| Latah |
73 |
4,841 |
335 |
7,591 |
10,097 |
22,937 |
| Lemhi |
15 |
393 |
36 |
3,388 |
1,420 |
5,252 |
| Lewis |
6 |
156 |
11 |
1,278 |
588 |
2,039 |
| Lincoln |
8 |
166 |
14 |
1,284 |
604 |
2,076 |
| Madison |
98 |
612 |
184 |
12,153 |
4,410 |
17,457 |
| Minidoka |
26 |
620 |
37 |
4,845 |
2,323 |
7,851 |
| Nez Perce |
76 |
2,639 |
148 |
8,787 |
9,745 |
21,395 |
| Oneida |
9 |
102 |
24 |
1,932 |
557 |
2,624 |
| Owyhee |
32 |
428 |
42 |
3,219 |
1,422 |
5,143 |
| Payette |
47 |
944 |
70 |
6,522 |
3,590 |
11,173 |
| Power |
8 |
383 |
13 |
1,690 |
1,199 |
3,293 |
| Shoshone |
27 |
1,318 |
36 |
2,559 |
2,705 |
6,645 |
| Teton |
15 |
1,337 |
64 |
2,423 |
2,525 |
6,364 |
| Twin Falls |
150 |
3,374 |
314 |
19,933 |
12,310 |
36,081 |
| Valley |
19 |
1,042 |
51 |
3,458 |
2,409 |
6,979 |
| Washington |
12 |
406 |
29 |
3,586 |
1,277 |
5,310 |
| Total |
3,277 |
112,411 |
8,416 |
439,906 |
308,784 |
872,794 |