Printable Blank Map of Idaho with Counties
Delineating all 44 counties across the Northern Rockies and Snake River Plain, this blank vector map of Idaho captures 83,569 square miles from the Nevada border to the Canadian boundary. Projected under NAD83 Idaho Central (EPSG:26968), it provides clean coordinate geometry for mapping irrigated agricultural lands, federal forest reservations, and the scenic Salmon River wilderness.
About this Blank Map of Idaho
This printable blank map represents Idaho on the authentic NAD83 (2011) / WGS84 ellipsoidal datum. All 6 interactive visual variants—including Blank Outline, Counties Boundaries, Centroid Labels, Capital City Marker (Boise), and High-Contrast Printer B&W—are generated synchronously from identical coordinate geometry.
| Specification | Value | Compliance & Source |
|---|---|---|
| Jurisdiction / Entity | Idaho | US State |
| Subdivisions Rendered | 44 Counties | Verified Topological Polygon Mesh |
| Primary Capital City | Boise | Marked on the capital variant |
| Cartographic Projection | NAD83 IDAHO CENTRAL | Distortion-Minimized Coordinate Map |
| Reference Datum | NAD83 (2011) / WGS84 | NOAA NGS / EPSG:26968 (State Plane Coordinate System) |
Idaho Counties at a Glance
- Counties
- 44
- Capital
- Boise
- Population (2020)
- 1,839,117
- Land area
- 82,643 sq mi
Most populous counties
- Ada County (Boise): 494,961 people, 26.9% of the state
- Canyon County (Caldwell): 231,102 people, 12.6% of the state
- Kootenai County (Coeur d'Alene): 171,363 people, 9.3% of the state
- Bonneville County (Idaho Falls): 123,964 people, 6.7% of the state
- Twin Falls County (Twin Falls): 90,049 people, 4.9% of the state
Largest counties by land area
- Idaho County (Grangeville): 8,477.5 sq mi
- Owyhee County (Murphy): 7,668.2 sq mi
- Custer County (Challis): 4,922.2 sq mi
- Lemhi County (Salmon): 4,563.7 sq mi
- Valley County (Cascade): 3,665.1 sq mi
Neighboring states
Figures: US Census Bureau 2020 Census populations and Gazetteer land areas. The full sortable list with seats and FIPS codes is on the Idaho county map & list page.
Geography Notes: Idaho
Idaho Central Transverse Mercator Geodesy
Idaho extends across seven degrees of latitude, requiring three State Plane zones to manage north-south scale distortion.
Centered on the 114°00'W meridian, the Central zone provides balanced scale from the Sawtooth Wilderness north through the Clearwater National Forest to the panhandle.
Surveyors and GIS analysts rely on this datum to trace irregular county boundaries that follow mountain ridge crests and canyon riverbeds.
Transverse Mercator geometry restricts scale error to less than 1:10,000 along the 480-mile north-south territorial axis.
The Snake River Crescent vs The Mountain Panhandle
Idaho is split geographically into two distinct populated sections separated by the Frank Church Wilderness.
The southern arc of the Snake River Plain contains Idaho's prime irrigated agricultural lands (famous for potato, sugar beet, and barley production) and the booming Boise-Nampa metropolitan corridor in Ada and Canyon counties.
Northern Idaho—the Panhandle—is dominated by deep glacial lakes (Coeur d'Alene, Pend Oreille), timber harvesting, and historic silver-lead mining districts in Shoshone County's Silver Valley.
Idaho County covers 8,485 square miles, making it the largest county in the state and larger than New Jersey.
Curated Classroom Activities & Spatial Labs for Idaho
Pedagogical lesson plans and spatial analysis activities designed specifically for printable vector maps of Idaho:
Snake River Plain & Mountain Wilderness Lab
Objective: Map the crescent volcanic plain of the Snake River and identify roadless mountain barriers.
Materials: Printed blank map of Idaho, blue and brown fine-line pens, topographic atlas.
- Trace the Snake River entering from Wyoming, curving across southern Idaho, and forming the western border with Oregon.
- Shade the Frank Church–River of No Return Wilderness across Idaho, Valley, Lemhi, and Custer counties.
- Identify Ada County (Boise) as the state capital and primary economic engine.
Idaho Federal Land Ownership & County Revenue Study
Objective: Investigate how 63% federal land ownership impacts local county property tax bases.
Materials: Printed Idaho county outline map, colored pencils.
- Identify Custer, Lemhi, and Idaho counties where over 85% of land is managed by the US Forest Service and BLM.
- Research federal Payments in Lieu of Taxes (PILT) and discuss county government funding constraints.
- Locate Boundary County along the 49th parallel international border with British Columbia, Canada.
The 6 Synchronized Variants Explained
We generate 6 synchronized variations of Idaho from the same master vector dataset. Each variant is aligned to identical coordinate geometry:
1. Blank Boundary Outline
The foundational boundary outline of Idaho. Rendered with a clean exterior stroke and zero fill—the optimal version for in-class labeling exams, custom cartographic overlays, or clean graphic design.
2. With Subdivisions (44 Counties)
Displays the exterior boundary plus internal administrative borders for all 44 counties. Each subdivision possesses a unique SVG element ID for direct styling and choropleth shading in vector editors.
3. Labeled with True Centroids
Features authentic typographic labels positioned at each administrative territory's mathematical center of mass. Perfect as a master grading answer key or self-study reference sheet.
4. Adjacent-Contrast Color Fill
Filled using an adjacency-contrast pastel palette so neighboring jurisdictions never blend together. Excellent for tactile visual discrimination and regional geography units.
5. With Capital City (Boise)
Pinpoints the official capital city of Boise using a high-visibility star marker and typographic callout, positioned at precise geodetic coordinates.
6. High-Contrast Printer B&W
Optimized specifically for monochrome desktop laser and inkjet printers. Uses pure black vector paths (#000000) and ultra-clean white fills to prevent ink-bleeding and toner smudging.
Tools to Use With This Map
- Interactive US county mapZoom into county lines on a live map.
- What county am I in?Find your county from your device location.
- True size comparisonDrag Idaho over other places to compare real areas.
- Map area calculatorDraw a shape and measure its area on the WGS84 ellipsoid.
- Color a mapShade regions online and download your own map.
Idaho County Map & Full List
See 2020 Census populations, seats, land areas and FIPS codes for every county in Idaho, with an on-page map and CSV export.
Need Definitions for Map Projections, SVG Vectors, or Centroids?
Explore our centralized Cartography Glossary for detailed definitions of national and global geodetic datums, equal-area vs. conformal projections, TopoJSON topological arcs, and choropleth classification standards.
Frequently Asked Questions About Idaho Blank Maps
Authoritative answers to common questions regarding printing, licensing, vector customization, and curriculum use:
What is the largest county by land area in Idaho?▼
Idaho County in central Idaho covers 8,485 square miles, stretching from the Oregon border across the Bitterroot Range to Montana.
Why is traveling between northern and southern Idaho so difficult on a map?▼
Central Idaho is dominated by the Salmon River Mountains and massive wilderness reserves with no north-south interstate highway; US Highway 95 is the only primary connecting route.
How many counties are in the Idaho Panhandle?▼
The Panhandle consists of five northern counties: Boundary, Bonner, Kootenai, Benewah, and Shoshone.