Idaho County Map With Cities
Complete list of all 44 counties in Idaho with population, area, and median income — plus a free printable blank map.
Tap or click any county for details. Need a printable version? Blank Idaho county map (PDF/PNG/SVG).
All 44 Idaho counties
| County | Largest City | Population ▼ | Area | Median Income | Cities |
|---|---|---|---|---|---|
| Ada | Boise | 500,759 | 1,053 mi² | $92,782 | 7 |
| Canyon | Nampa | 249,392 | 587 mi² | $78,659 | 8 |
| Kootenai | Coeur D Alene | 184,228 | 1,244 mi² | $82,276 | 10 |
| Bonneville | Idaho Falls | 131,027 | 1,866 mi² | $79,503 | 8 |
| Twin Falls | Twin Falls | 95,212 | 1,921 mi² | $67,710 | 8 |
| Bannock | Pocatello | 72,824 | 1,112 mi² | $68,792 | 7 |
| Madison | Rexburg | 56,613 | 469 mi² | $59,693 | 4 |
| Elmore | Mountain Home | 49,625 | 3,075 mi² | $92,550 | 6 |
| Bonner | Sandpoint | 48,468 | 1,735 mi² | $69,920 | 17 |
| Bingham | Blackfoot | 48,339 | 2,094 mi² | $78,745 | 10 |
| Nez Perce | Lewiston | 43,845 | 848 mi² | $71,921 | 8 |
| Latah | Moscow | 40,960 | 1,076 mi² | $67,033 | 10 |
| Jefferson | Rigby | 32,160 | 1,094 mi² | $86,940 | 7 |
| Cassia | Burley | 26,540 | 2,565 mi² | $70,347 | 7 |
| Power | American Falls | 26,126 | 1,404 mi² | $59,412 | 4 |
| Payette | Payette | 25,676 | 407 mi² | $67,367 | 3 |
| Jerome | Jerome | 25,223 | 597 mi² | $71,213 | 3 |
| Blaine | Hailey | 24,883 | 2,644 mi² | $93,503 | 6 |
| Minidoka | Rupert | 22,211 | 758 mi² | $67,156 | 4 |
| Gem | Emmett | 20,075 | 561 mi² | $66,281 | 4 |
| Idaho | Grangeville | 18,759 | 8,477 mi² | $67,308 | 14 |
| Owyhee | Homedale | 15,349 | 7,666 mi² | $68,605 | 7 |
| Franklin | Preston | 15,056 | 664 mi² | $70,104 | 6 |
| Shoshone | Kellogg | 13,668 | 2,630 mi² | $56,707 | 12 |
| Gooding | Gooding | 13,486 | 729 mi² | $63,133 | 3 |
| Boundary | Bonners Ferry | 13,153 | 1,269 mi² | $67,743 | 5 |
| Valley | Mccall | 12,548 | 3,665 mi² | $75,744 | 5 |
| Teton | Victor | 12,425 | 449 mi² | $105,497 | 4 |
| Fremont | Saint Anthony | 11,766 | 1,864 mi² | $71,153 | 6 |
| Washington | Weiser | 11,138 | 1,453 mi² | $53,595 | 3 |
| Benewah | Saint Maries | 10,658 | 777 mi² | $61,864 | 6 |
| Clearwater | Orofino | 8,556 | 2,457 mi² | $63,995 | 5 |
| Lemhi | Salmon | 8,248 | 4,563 mi² | $54,388 | 10 |
| Caribou | Soda Springs | 7,355 | 1,764 mi² | $67,927 | 3 |
| Bear Lake | Montpelier | 6,384 | 975 mi² | $73,819 | 9 |
| Boise | Garden Valley | 6,053 | 1,899 mi² | $71,678 | 6 |
| Lincoln | Shoshone | 5,379 | 1,201 mi² | $70,225 | 3 |
| Oneida | Malad City | 4,756 | 1,200 mi² | $76,328 | 2 |
| Adams | Council | 4,718 | 1,363 mi² | $68,498 | 4 |
| Custer | Challis | 4,198 | 4,921 mi² | $54,952 | 5 |
| Butte | Arco | 2,957 | 2,232 mi² | $56,420 | 3 |
| Lewis | Craigmont | 1,536 | 479 mi² | $62,864 | 2 |
| Camas | Fairfield | 1,053 | 1,074 mi² | $66,250 | 2 |
| Clark | Dubois | 753 | 1,764 mi² | $54,148 | 2 |
How many counties does Idaho have?
Idaho has 44 counties covering 82,644 square miles and roughly 1,803,111 residents. The state was admitted to the Union in 1890 as the 43rd state, and the current county boundaries reflect more than a century of administrative subdivision.
The largest county by land area is Idaho County at 8,477 square miles, home to about 18,759 residents. The most populous is Ada County with approximately 500,759 residents — a density of about 476 people per square mile.
At the other end of the scale, Clark County has only about 753 residents.
Boise is both the state capital and the largest city in Idaho.
Related resources
Download a printable outline of Idaho’s county boundaries from our blank map of Idaho page — available in SVG, PNG, and PDF.
Use the What County Am I In? tool to detect which Idaho county a GPS location or address falls in, or the Address to County Lookup for batch input.
For demographic radius analysis, the Find ZIP Codes in Radius and Population Within Radius tools let you draw a circle around any Idaho address and see every ZIP code and the total population inside.
Two SimpleMapLab studies cover Idaho specifically: the 100-mile radius around Boise measures how much of the state lives within 100 miles of its capitol, and the loneliest town in Idaho ranks the state’s most isolated inhabited place. The county-counts blog post puts Idaho’s 44 counties in national context.
Frequently asked questions
Population and demographics are aggregated from ZIP-code-level US Census data via the SimpleMaps dataset. Countiesboundaries are from the US Atlas TopoJSON build of the Census Bureau’s TIGER/Line shapefiles. Land area is from the Census Gazetteer. State counts follow the US Census Bureau’s definition of counties and county-equivalents (50 states + DC = 3,144). All sources are public domain.