How to use this list
Counties are sorted alphabetically. Use ZIP count and population to spot larger counties, then open a county for its ZIP roster and income/housing averages.
Idaho counties
44 counties · 280 ZIP codes · population 1,893,322 . Select a county to open its ZIP table and local summary.
Related pages
Also see the Idaho overview, cities, rankings, and congressional districts.
| County | ZIP codes | Population | Avg. income |
|---|---|---|---|
| Ada County | 16 | 490,143 | $88,998 |
| Adams County | 4 | 4,474 | $60,405 |
| Bannock County | 9 | 71,906 | $73,185 |
| Bear Lake County | 9 | 6,359 | $79,876 |
| Benewah County | 6 | 10,411 | $48,091 |
| Bingham County | 9 | 47,851 | $68,411 |
| Blaine County | 7 | 24,541 | $80,163 |
| Boise County | 6 | 5,984 | $70,335 |
| Bonner County | 16 | 47,240 | $74,240 |
| Bonneville County | 11 | 128,579 | $72,480 |
| Boundary County | 4 | 12,673 | $67,613 |
| Butte County | 3 | 2,964 | $47,624 |
| Camas County | 2 | 1,107 | $59,318 |
| Canyon County | 10 | 241,156 | $72,111 |
| Caribou County | 3 | 7,249 | $67,141 |
| Cassia County | 7 | 26,171 | $69,652 |
| Clark County | 2 | 701 | $61,268 |
| Clearwater County | 5 | 8,389 | $47,169 |
| Custer County | 5 | 4,109 | $62,069 |
| Elmore County | 6 | 49,123 | $78,857 |
| Franklin County | 6 | 14,715 | $84,837 |
| Fremont County | 6 | 11,596 | $88,264 |
| Gem County | 4 | 19,044 | $73,685 |
| Gooding County | 3 | 13,299 | $62,715 |
| Idaho County | 12 | 18,475 | $60,960 |
| Jefferson County | 7 | 31,220 | $78,118 |
| Jerome County | 3 | 24,830 | $64,415 |
| Kootenai County | 11 | 179,597 | $79,906 |
| Latah County | 11 | 40,238 | $75,589 |
| Lemhi County | 9 | 8,158 | $60,525 |
| Lewis County | 2 | 1,512 | $60,238 |
| Lincoln County | 3 | 5,225 | $66,203 |
| Madison County | 5 | 55,519 | $70,652 |
| Minidoka County | 3 | 22,157 | $72,967 |
| Nez Perce County | 8 | 43,674 | $64,923 |
| Oneida County | 2 | 4,667 | $73,375 |
| Owyhee County | 7 | 15,142 | $53,575 |
| Payette County | 3 | 24,899 | $66,360 |
| Power County | 4 | 25,767 | $64,775 |
| Shoshone County | 12 | 13,492 | $56,276 |
| Teton County | 4 | 12,101 | $86,786 |
| Twin Falls County | 8 | 93,666 | $70,758 |
| Valley County | 4 | 12,333 | $64,188 |
| Washington County | 3 | 10,866 | $62,622 |
Frequently asked questions
- How many counties are listed for Idaho?
- US5 currently lists 44 counties with published ZIP coverage in Idaho. Counts can change as geography publishes update.
- What happens when I open a county?
- Each county page shows ZIP totals, income and housing averages, and a ZIP table. From there you can open any ZIP for a full demographics dashboard.