Lemhi County is a county in Idaho, United States, home to the Salmon River’s main stem and the Sacajawea Interpretive, Cultural and Educational Center. It had a population of 7,974 at the 2020 census and covers 4,563 square miles (11,820 km2) of land centred near 44\u00b058\u2032N 113\u00b057\u2032W, making it Idaho’s fourth-largest county by area.<\/p>\n
Salmon is the county seat, and its postal code is 83467. The county has 2 incorporated cities (Salmon and Leadore) and about 8 unincorporated communities. Lemhi County sits in the Mountain time zone.<\/p>\n
Lemhi County has 2 incorporated cities and roughly a dozen unincorporated communities and mining-era place names strung along the Salmon and Lemhi rivers. Most of the smaller entries below are post offices or historic camps rather than towns with local government; CDP = census-designated place, Unincorp. = unincorporated community or locality with no municipal government.<\/p>\n
| Place<\/th>\n | Type<\/th>\n | Pop.<\/th>\n | ZIP<\/th>\n<\/tr>\n |
|---|---|---|---|
| Salmon<\/td>\n | City · seat<\/td>\n | 3,119<\/td>\n | 83467<\/td>\n<\/tr>\n |
| Leadore<\/td>\n | City<\/td>\n | 98<\/td>\n | 83464<\/td>\n<\/tr>\n |
| Carmen<\/td>\n | Unincorp.<\/td>\n | —<\/td>\n | 83462<\/td>\n<\/tr>\n |
| Cobalt<\/td>\n | Unincorp.<\/td>\n | —<\/td>\n | 83229<\/td>\n<\/tr>\n |
| Elk Bend<\/td>\n | Unincorp.<\/td>\n | —<\/td>\n | —<\/td>\n<\/tr>\n |
| Gibbonsville<\/td>\n | Unincorp.<\/td>\n | —<\/td>\n | 83463<\/td>\n<\/tr>\n |
| Lemhi<\/td>\n | Unincorp.<\/td>\n | —<\/td>\n | 83465<\/td>\n<\/tr>\n |
| May<\/td>\n | Unincorp.<\/td>\n | —<\/td>\n | 83253<\/td>\n<\/tr>\n |
| North Fork<\/td>\n | Unincorp.<\/td>\n | —<\/td>\n | 83466<\/td>\n<\/tr>\n |
| Shoup<\/td>\n | Unincorp.<\/td>\n | —<\/td>\n | 83469<\/td>\n<\/tr>\n |
| Tendoy<\/td>\n | Unincorp.<\/td>\n | —<\/td>\n | 83468<\/td>\n<\/tr>\n<\/table>\n<\/div>\n A handful of old-list entries are historic mining camps rather than standing settlements and are not carried into the table above: Baker, Blackbird, Forney, Gilmore, Hahn, Junction, Leadville, Leesburg, Nicholia, Williams Lake Resort and Yellowjacket. Leesburg (gold discovered 1866), Lemhi (1867) and Shoup (1868) were the boomtowns of the county’s 1860s gold rush; several are now ghost towns or seasonal residences with no verifiable current population figure.<\/p>\n ZIP Codes<\/h2>\nElk Bend has no ZIP code of its own; residents there use the Salmon or North Fork post offices.<\/p>\n Geography<\/h2>\nLemhi County is a rugged mountain county along the Idaho–Montana state line, split by the Lemhi Range and the Salmon River Mountains, with the Salmon River — the “River of No Return” — running through the Salmon and North Fork areas before entering the Frank Church–River of No Return Wilderness. Much of the county’s land is national forest.<\/p>\n |