Idaho

Across Idaho, GIS Map currently maps 30 cities and towns that together hold around 1,159,870 residents. The Gem State offers rugged wilderness, world-class skiing, and pristine rivers. The most populous community is Boise, with about 237,242 residents in Ada County, and it has an interactive street, satellite and topographic map. Meridian (130,138) and Nampa (110,319) follow. The state capital, Boise, sits in Ada County.

County-level coverage in Idaho includes 44 official Census boundaries, each paired with local demographics. Ada County is the most populous, with about 518,935 residents. The highest median household income belongs to Teton County at $99,805. Home values peak in Blaine County, where the median owner-occupied home is worth about $735,300. By land area, Idaho County is the largest at roughly 8,478 square miles. The youngest population, with a median age of 21.4, is found in Madison County. Among mapped cities with at least 10,000 residents, Eagle reports the highest median household income at $122,894. All figures come from the U.S. Census Bureau's American Community Survey 2020-2024 five-year estimates.

Elevation varies considerably across Idaho. Driggs is the highest at about 6,112 feet above sea level, while Lewiston is the lowest at about 741 feet. The state is split between time zones: Mountain (23 cities) and Pacific (7 cities). According to the USDA U.S. General Soil Map, Mollisols are the dominant soil order beneath 16 of the mapped city centers. Federal records list 2 government-owned and 59 leased properties in these cities, the most in Boise. City maps let you switch on FEMA flood zones, USGS contours and land cover layers.

Idaho has 50 ZIP code areas with their own boundary maps and Census figures on our site. The most populated one has about 76,023 residents. The runner-up counts roughly 63,592 people. The densest packs about 5,061 people per square mile. Every page includes drawing and measuring tools plus a click-anywhere inspector that reports the county, ZIP, census tract, school district, flood zone and elevation of any point.