Idaho County Maps
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Idaho has 44 counties, a population of more than 2 million people, about 280 zip codes and 167 public school districts. Those counties vary widely in population, school enrollment, zip code coverage and local boundary structure. Ada County has the largest population in the state, while Clark County has the smallest. Browse the map, population, zip codes, school districts, county subdivisions and county list sections below to explore further. Or, simply start typing in the box below to go directly to that county.
Interactive Idaho County Map
This Idaho county map preview highlights population-by-county context, ZIP code coverage, school districts, and local boundary structure. Full statewide and county-level data packages are available when you need complete downloadable datasets. Click or tap any county to view its maps, trends and data.
Start with a free preview, or go straight to the full Idaho dataset .
Idaho Population By County
Idaho's population was over 2 million in 2020, up 271,524 (17.32%) residents from 2010. Ada County had the largest population in the state with 494,967 people. Canyon and Kootenai Counties also stand out as major population centers. Clark County was the least populated area in Idaho with only 790 residents. The table below compares Idaho county populations and recent population trends.
The Most Populated Counties In Idaho
| County | Population | Trend (2010-2020) |
|---|---|---|
| Ada County | 494,967 | ▴ 26.15% |
| Canyon County | 231,105 | ▴ 22.33% |
| Kootenai County | 171,362 | ▴ 23.73% |
| Bonneville County | 123,964 | ▴ 18.93% |
| Twin Falls County | 90,046 | ▴ 16.59% |
| Download all county population data | ||
County populations reflect the latest state serving context (2020).
Idaho County Map With ZIP Codes
Idaho has about 280 zip codes statewide. Ada County contains the most zip codes, with 16. County-level zip code maps give a faster and clearer way to understand local coverage as zip boundaries can span county and municipal lines. The maps below highlight a few Idaho counties.
Idaho School Districts By County
Idaho has 167 public school districts with 371,620 students enrolled as of 2024. Canyon County has the highest district count in the state. Ada County has the largest total school enrollment. Bingham County posted the largest recent enrollment gain. The table below compares county level school district totals and recent enrollment trends across the state.
Largest School Districts in Idaho
| County | Districts | Enrollment | Trend |
|---|---|---|---|
| Canyon County | 11 | 43,152 | ▾ 0.77% |
| Twin Falls County | 9 | 15,290 | ▾ 1.58% |
| Owyhee County | 8 | 3,872 | ▴ 0.96% |
| Nez Perce County | 7 | 6,870 | ▾ 2.23% |
| Bonneville County | 6 | 27,609 | ▾ 1.41% |
| Download all school district data | |||
School district enrollment and trend values reflect the most recent state-level context (2024).
Idaho County Map With County Subdivisions
Idaho has about 170 county subdivisions statewide. These boundaries add another layer of local detail and help show how subdivision lines fit inside county boundaries. The previews below highlight a few counties with available subdivision map coverage.
Get the Full Idaho Data Package
The sections above provide a preview of Idaho county maps and county-level data. The full package includes complete statewide coverage with ready-to-use files for mapping, planning, and analysis.
Everything is organized to save hours of data collection, cleanup, and integration work.
- County map exports and boundary coverage for every county in Idaho
- Statewide GIS layers for ZIP codes, subdivisions, school districts, roads, water, and political boundaries
- Population, demographics, school, housing, and trend context aligned across counties
- Database files, map-ready exports, and documentation designed for faster research workflows
Includes GIS layers, maps, demographics, analytics, database files and planning tools.