Site Navigation Arizona California Colorado Idaho Montana Nevada New Mexico Utah Wyoming     Idaho Gateway @ AARoads Sitemap to all pages covering the state of Idaho. Unless otherwise noted, all photographs taken by Alex Nitzman and Andy Field. Population Statistics State Population 1,466,465 Top County Populations Ada 359,035 Canyon 173,302 Kootenai 131,507 Bonneville 94,630 Cache 91,391 Washington 90,354 Top City Populations Boise 190,117 Bannock 78,443 Twin Falls 71,575 Idaho Falls 51,507 Meridian 41,127 Coeur d'Alene 37,262 Twin Falls 36,742 Caldwell 31,041 Lewiston 30,937 Source: 2006, 2003 U.S. Census Data Estimates Other Statistics Capital: Boise Nickname: Gem State Area: 82,751 square miles Statehood: 43rd state; admitted July 3, 1890 Total Interstate Mileage: 611.76 miles Highest Point: Borah Peak, 12,662 feet Highway Guides Interstate 184 Boise Road Photos Miscellaneous Idaho Highways Idaho 34 north and Idaho 36 east Idaho 34 north and Idaho 36 are cosigned in Preston in southeastern Idaho. The routes will divide a few miles northeast of Preston, with Idaho 34 continuing north to Grace and Soda Springs, while Idaho 36 travels east to Montpelier. Photo taken 03/01/10 by Landry Heaton. Idaho 36 west Westbound Idaho 36 approaches Idaho 34 northeast of Preston. The two routes will share alignment southwest into Preston. Photo taken 03/01/10 by Landry Heaton. Idaho 34 south and Idaho 36 west At the intersection with U.S. 91 in Preston, Idaho 34 south reaches its endpoint, while Idaho 36 west travels to Dayton and Malad City. Photo taken 03/01/10 by Landry Heaton. Page Updated August 31, 2011.