Idaho is a state in the northwest part of the United States, with a population of around 1.6 million people and a population density of 7.40 people per square kilometer over an area of 216,636 square kilometers. Boise is the biggest city in Idaho state, with a population of 214,237 (2013 estimate) and a population density of 1,027 people per km2 on an area of 208 km2. Idaho State has the seventh-lowest population density among the 50 United States, with around 14 cities with populations greater than 15,000 people.
| Rank | Name | Population | Area (km²) | Density ( inhabitants/km²) | County |
|---|---|---|---|---|---|
| 1 | Boise City | 214,237 | 208 | 1,027 | Ada |
| 2 | Nampa | 86,518 | 81 | 1,060 | Canyon |
| 3 | Meridian | 83,596 | 70 | 1,193 | Ada |
| 4 | Idaho Falls | 58,292 | 58 | 1,003 | Bonneville |
| 5 | Pocatello | 54,350 | 84 | 646 | Bannock |
| 6 | Caldwell | 48,957 | 57 | 854 | Canyon |
| 7 | Coeur d'Alene | 46,402 | 40 | 1,149 | Kootenai |
| 8 | Twin Falls | 45,981 | 47 | 972 | Twin Falls |
| 9 | Lewiston | 32,401 | 44 | 726 | Nez Perce |
| 10 | Post Falls | 29,357 | 37 | 790 | Kootenai |
| 11 | Rexburg | 26,520 | 25 | 1,057 | Madison |
| 12 | Moscow | 24,534 | 17 | 1,377 | Latah |
| 13 | Eagle | 21,646 | 76 | 284 | Ada |
| 14 | Kuna | 16,532 | 46 | 352 | Ada |