Idaho County Map with Cities
Explore county and ZCTA boundaries
Counties: generalized 2025 TIGERweb. ZIP areas: 2020 Census ZCTAs, not USPS delivery ZIP borders. These datasets are different vintages.
Use the load button to fetch the dated Census geometry.
| Geographic feature | GEOID | Land area (km²) |
|---|
Source: U.S. Census Bureau TIGERweb. The service can be unavailable or rate-limited. Do not treat estimates as legal property boundaries.
Explore geography, source year and identifier definitions before using the map.
Explore this historical reference layer and search its county or county-equivalent names and FIPS identifiers. Alphabetical list as contained in the bundled historic dataset. This is not a verified current count. 44 reference entries Source limitations: Geometry from bundled Basemap Idaho Map
County and County-Equivalent Reference List
County / equivalent FIPS (dataset) Ada 16001 Adams 16003 Bannock 16005 Bear Lake 16007 Benewah 16009 Bingham 16011 Blaine 16013 Boise 16015 Bonner 16017 Bonneville 16019 Boundary 16021 Butte 16023 Camas 16025 Canyon 16027 Caribou 16029 Cassia 16031 Clark 16033 Clearwater 16035 Custer 16037 Elmore 16039 Franklin 16041 Fremont 16043 Gem 16045 Gooding 16047 Idaho 16049 Jefferson 16051 Jerome 16053 Kootenai 16055 Latah 16057 Lemhi 16059 Lewis 16061 Lincoln 16063 Madison 16065 Minidoka 16067 Nez Perce 16069 Oneida 16071 Owyhee 16073 Payette 16075 Power 16077 Shoshone 16079 Teton 16081 Twin Falls 16083 Valley 16085 Washington 16087 UScounties shapefile (EPSG:4269), source vintage not verified. Do not quote its numeric totals as present-day administrative counts. Downloaded SVG files include no legal accuracy warranty.
Understanding the county-equivalent system in Idaho
Some city and county boundaries overlap, while unincorporated areas lie outside municipal limits. County maps must state the record year and jurisdiction definition. County-equivalent units are the level used in many Census datasets; state-level terminology and changes over time can affect counts and boundaries.
Examples of Idaho county GEOIDs
| Legacy reference name | Five-digit GEOID | County part |
|---|---|---|
| Ada | 16001 |
001 |
| Adams | 16003 |
003 |
| Bannock | 16005 |
005 |
| Bear Lake | 16007 |
007 |
| Benewah | 16009 |
009 |
| Bingham | 16011 |
011 |
The first two FIPS digits identify the state in this dataset (16); the following three digits identify a county or county-equivalent record. Preserve leading zeros when storing these IDs in spreadsheets, CSV or databases.
How to read and verify the county map
- Start with the state outline and use the on-page search to find a county or full FIPS code.
- Check whether the entry represents a county, parish, borough, census area or independent city.
- Use the source-year label when referencing boundaries or computing statistics.
- For modern population, area or county-seat statistics, join this table to a verified dated government source rather than guessing from the map.
County lists versus postal addresses
A ZIP code, county name and postal city serve different purposes. A mailing address can use a neighboring city’s name, and one ZIP can intersect several counties. Use a point-in-polygon lookup against a properly dated jurisdiction layer when an exact address-to-county answer matters.
Official data to cross-check
The U.S. Census Bureau publishes 2025 Gazetteer county tables with area and representative coordinate fields, and TIGER/Line boundaries. The Gazetteer files do not include population; a separately dated Census or ACS table is required for that value.
How to use the Idaho county GEOID list
Our bundled Idaho reference includes 44 county or county-equivalent names. These are identifiers from a historical/unverified-vintage dataset, not a verified current list of official county populations or boundaries. Use the first two digits to recognize the state FIPS prefix 16.
| County | Five-digit GEOID | County suffix |
|---|---|---|
| Ada | 16001 | 001 |
| Adams | 16003 | 003 |
| Bannock | 16005 | 005 |
| Bear Lake | 16007 | 007 |
| Benewah | 16009 | 009 |
| Bingham | 16011 | 011 |
| Blaine | 16013 | 013 |
| Boise | 16015 | 015 |
| Bonner | 16017 | 017 |
| Bonneville | 16019 | 019 |
| Boundary | 16021 | 021 |
| Butte | 16023 | 023 |
| Camas | 16025 | 025 |
| Canyon | 16027 | 027 |
| Caribou | 16029 | 029 |
| Cassia | 16031 | 031 |
| Clark | 16033 | 033 |
| Clearwater | 16035 | 035 |
| Custer | 16037 | 037 |
| Elmore | 16039 | 039 |
| Franklin | 16041 | 041 |
| Fremont | 16043 | 043 |
For publication-grade administrative statistics, join county GEOIDs to a specified release of the US Census geography/ACS tables. County-seat, income and population columns must be separately sourced and labeled by year. A postal ZIP can cross a county line, so county matching from a ZIP alone is not always exact.
Official cross-checks: Census TIGER/Line geographic files · Census ACS data.
10 questions about Idaho
Questions based on search intent and competitor topics; not a verified Google People Also Ask feed.
How many counties or county equivalents are listed for Idaho?
The bundled reference currently contains 44 entries for Idaho. Because the underlying source vintage is not confirmed against the latest Census release, verify the authoritative current count before quoting it.
What is the county FIPS code for Idaho?
Idaho has state-level FIPS prefix 16. A complete county GEOID combines the two-digit state code and a three-digit county code. For example, Ada has the stored GEOID 16001.
How do I locate a county on the Idaho map?
Use the county-name/FIPS table and consult an authoritative labeled map to match a name to its boundary. A point near a border needs a precise coordinate-based check.
Can I download a blank Idaho county map?
Check the associated printable-map page. County outlines require actual county geometry; an exterior state outline alone does not provide individual county borders.
Does the list include all current county equivalents in Idaho?
The page displays records in the bundled historical reference, not a certified current list. Independent cities and similar county equivalents require careful definition.
Is the Idaho county data from the latest Census year?
No current-vintage certification is claimed for this local dataset. Compare names and GEOIDs against a dated TIGER/Line or Census Gazetteer file.
What is the difference between a county and a ZIP Code in Idaho?
County boundaries are government/statistical administrative areas; ZIP Codes are postal delivery identifiers and often cross counties. ZIP Code Tabulation Areas are Census approximations.
Can I look up a Idaho county by address?
An authoritative geocoding service or Census Geocoder can map an address to an official county. County names alone do not determine the county of every address.
Where do I find county population and land area for Idaho?
Use a named Census population-estimate vintage for people and a Gazetteer/TIGER data year for area. Avoid mixing Census years when calculating density or ranks.
Can I use Idaho county borders for property or legal decisions?
No. The reference is intended for education and general exploration. Property and administrative boundary decisions require current authoritative local records and licensed surveys where appropriate.
Editorial and data status: This is an unpublished reference draft. The information must be checked before the page can be treated as current geographic data or production-ready research.