Idaho County, Idaho
Idaho County: county in Idaho, United States
About
Idaho County is a county located in the U.S. state of Idaho. As of the 2010 census, the population was 16,267 and a population density of 1 people per km². After 9 years in 2019 county had an estimated population of 16,667 inhabitants. Its county seat is Grangeville. The county was created 162 years ago in 1864.
County Snapshot
Idaho County at a glance
Idaho County currently has 7 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
7
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Idaho counties
44
Open related pagesLargest city
GrangevillePopulation 3,237
Top linked places
Quick Facts about Idaho County
| Population | 16,667 (2019) |
| Country | United States of America |
| State | Idaho (United States) |
| Area | 22021 km2 |
| Official name | Idaho County |
| Water as percent of area | 0.3% |
| Land as percent of area | 99.7% |
| Latitude & Longitude | 45.8442,-115.4675 |
| Named for | Idaho |
| Altitude | 9,439 feet / 2877 meters |
| Capital | Grangeville |
| Establishment | February 04, 1864 |
| Time Zone | America/Los_Angeles |
| Local time | 19:55:40 (18th April 2026) |
| Density | 1 Pop. per km² as of 2019 |
| Population growth | 2.4% (2010-2019) |
| Weather | 19℉ Patchy Fog 7-days weather |
Geography
Idaho County is located at 45°50'39"N 115°28'3"W (45.8442000, -115.4674500). It has 9 neighbors: Adams County, Clearwater County, Lemhi County, Lewis County, Nez Perce County, Valley County, Missoula County, Ravalli County and Wallowa County.
Idaho County map
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The largest city of Idaho County is Grangeville with a population of 3,237. Other cities include, Cottonwood population 940, Kooskia population 664, Riggins population 416 and Stites population 232. See all Idaho County cities & populated places.
Idaho County Populated Places
Cities, towns, neighborhoods & other populated places in Idaho County.
| City Name | Population | Title |
|---|---|---|
| Grangeville | 3,237 | City in and county seat of Idaho County, Idaho, United States |
| Cottonwood | 940 | Town in Idaho County, Idaho, United States |
| Kooskia | 664 | City in Idaho County, Idaho, United States |
| Riggins | 416 | City in Idaho County, Idaho, United States |
| Stites | 232 | City in Idaho County, Idaho, United States |
| Ferdinand | 162 | City in Idaho, United States |
| White Bird | 95 | City in Idaho County, Idaho, United States |
Weather
Patchy fog between 11pm and 3am. Mostly clear, with a low around 19. North wind around 3 mph.
7-Day ForecastOfficial website of Idaho County
Official Website- Grangeville
Demographics
The population of Idaho County increased by 2.4% in 9 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 16,267 | - | census |
| 2011 | 16,462 | 1.18% | estimation process |
| 2012 | 16,444 | -0.11% | estimation process |
| 2013 | 16,249 | -1.2% | estimation process |
| 2014 | 16,275 | 0.16% | estimation process |
| 2015 | 16,301 | 0.16% | estimation process |
| 2016 | 16,236 | -0.4% | estimation process |
| 2017 | 16,373 | 0.84% | estimation process |
| 2018 | 16,476 | 0.63% | estimation process |
| 2019 | 16,667 | 1.15% | estimation process |
Idaho Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Ada County | 481,587 | County in Idaho, United States |
| Canyon County | 229,849 | County in Idaho, United States |
| Boise | 228,959 | The capital of Idaho. |
| Kootenai County | 165,697 | County in Idaho, United States |
| Bonneville County | 119,062 | County in Idaho, United States |
| Meridian | 114,161 | The most populous city in Ada County, Idaho. |
| Nampa | 99,277 | The most populous city in Canyon County, Idaho. |
| Bannock County | 87,808 | County in Idaho, United States |
| Twin Falls County | 86,878 | County in Idaho, United States |
| Idaho Falls | 62,888 | The most populous city in Bonneville County, Idaho. |
| Caldwell | 58,481 | The most populous city in Canyon County, Idaho. |
| Pocatello | 56,637 | The most populous city in Bannock County, Idaho. |
| Coeur d'Alene | 52,414 | A city in Kootenai County, Idaho. |
| Twin Falls | 50,197 | The most populous city in Twin Falls County, Idaho. |
| Bingham County | 46,811 | County in Idaho, United States |
| Bonner County | 45,739 | County in Idaho, United States |