| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Kameron | city | Idaho | United States | 46.77 | -116.25 | 3349 | |
| Kamiah | city | Idaho | United States | 46.23 | -116.03 | 1669 | |
| Karcher Junction | city | Idaho | United States | 43.59 | -116.60 | 2509 | |
| Katka | city | Idaho | United States | 48.69 | -116.14 | 1814 | |
| Kaufman (historical) | city | Idaho | United States | 44.16 | -112.91 | 6125 | |
| Keeler | city | Idaho | United States | 46.96 | -116.31 | 3349 | |
| Keenan City (historical) | city | Idaho | United States | 43.14 | -111.34 | 6797 | |
| Kellogg | city | Idaho | United States | 47.54 | -116.12 | 2598 | |
| Kelso | city | Idaho | United States | 48.01 | -116.71 | 2509 | |
| Kelso | city | Idaho | United States | 42.07 | -113.31 | 5029 | |
| Kendrick | city | Idaho | United States | 46.61 | -116.65 | 1669 | |
| Kenyon | city | Idaho | United States | 42.42 | -113.87 | 4291 | |
| Keogh | city | Idaho | United States | 42.22 | -113.33 | 4586 | |
| Ketchum | city | Idaho | United States | 43.68 | -114.36 | 5869 | |
| Keuterville | city | Idaho | United States | 46.03 | -116.44 | 4189 | |
| Kilgore | city | Idaho | United States | 44.40 | -111.89 | 6709 | |
| Kimama | city | Idaho | United States | 42.84 | -113.80 | 4307 | |
| Kimball | city | Idaho | United States | 43.27 | -112.22 | 4563 | |
| Kimberly | city | Idaho | United States | 42.53 | -114.36 | 4189 | |
| King Hill | city | Idaho | United States | 43.00 | -115.20 | 2604 | |
| Kings Corner | city | Idaho | United States | 43.52 | -116.53 | 2578 | |
| Kingston | city | Idaho | United States | 47.55 | -116.27 | 2509 | |
| Kinney Point Summer Home Area | city | Idaho | United States | 44.64 | -115.67 | 5298 | |
| Kinport | city | Idaho | United States | 42.75 | -111.94 | 5396 | |
| Kippen | city | Idaho | United States | 46.31 | -116.55 | 3661 | |
| Knowlton Heights | city | Idaho | United States | 43.55 | -116.77 | 2509 | |
| Knull | city | Idaho | United States | 42.53 | -114.56 | 4189 | |
| Konkolville | city | Idaho | United States | 46.50 | -116.20 | 1669 | |
| Kooskia | city | Idaho | United States | 46.14 | -115.98 | 1669 | |
| Kootenai | city | Idaho | United States | 48.31 | -116.51 | 2073 | |
| Kuna | city | Idaho | United States | 43.49 | -116.42 | 2769 | |
| Kyle (historical) | city | Idaho | United States | 47.33 | -115.76 | 3480 |