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Idaho Summary

Below you will find county-by-county maps and tables that illustrate the data in this study.

Click on chart for a larger version below.

Our research found that:

  • Of the 11 western states, Idaho has the fifth largest area of undeveloped, forested private land bordering fire-prone public lands, and ranks sixth among western states in the amount of forested land where homes have already been built next to public lands.
  • Idaho has over 2,000 square miles of forested private land that borders public lands, of which 90 percent has not yet been developed.
  • Housing in Idaho's wildland urban interface consumes a whopping 7.0 acres per person, compared to the 0.5 acres per person average on other western private lands. Only in Wyoming do people take up more space per person for housing.
  • Idaho has 30,026 residences in its wildland urban interface, of which 31 percent are seasonal homes or cabins.
  • Idaho ranks seventh among western states in the number of homes built in forested areas next to public wildlands, and sixth in the percentage of those homes that are only seasonally occupied.

In Idaho, existing risk of wildfire (number of square miles of the wildland urban interface with homes now) and potential future risk (number of square miles of wildland interface that remains undeveloped) are both highest in the northern parts of the state. Bonner County, where 8,020 homes are spread across 77 square miles of wildland urban interface, ranks fourth in the West in terms of existing wildfire risk. Shoshone County also has extensive development (more than 20 square miles) near fire-prone wildlands. Northern Idaho has exceptionally high potential risk. Combined, the ten most northern counties in Idaho have more than 1,500 square miles of undeveloped, forested private land adjacent to fire-prone wildlands where homes could likely be built in the future, increasing risks to human life and property as well as the financial burden on taxpayers.

Existing Risk Map - Click to Zoom
Yellow areas on the map illustrate existing development in fire-prone areas (forested areas adjacent public lands that have been developed); all other development is shown in red; public lands are shown in green.

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Idaho Summary Statistics
West-Wide 3,290.0 20,350.1 14.0% 915,071 21.0%
Idaho 211.0 1,936.8 9.8% 30,026 31.0%

Top 10 Counties in Idaho Ranked by Existing Risk

Counties are ranked by the number of square miles of developed land in the wildland interface
Bonner County Idaho 76.7 230.5 25.0% 8,020 31.0%
Shoshone County Idaho 22.9 308.9 7.0% 3,605 11.0%
Kootenai County Idaho 18.9 128.5 13.0% 4,818 15.0%
Boise County Idaho 14.8 51.8 22.0% 2,116 42.0%
Idaho County Idaho 13.0 224.8 5.0% 1,192 34.0%
Boundary County Idaho 11.7 119.7 9.0% 784 9.0%
Clearwater County Idaho 8.8 324.9 3.0% 1,242 12.0%
Benewah County Idaho 6.9 112.4 6.0% 601 11.0%
Fremont County Idaho 6.6 15.9 29.0% 1,483 87.0%
Valley County Idaho 6.0 60.2 9.0% 2,213 68.0%

Top 10 Counties in Idaho Ranked by Potential Risk

Counties are ranked by the number of square miles of undeveloped land in the wildland interface.
Clearwater County Idaho 8.8 324.9 3.0% 1,242 12.0%
Shoshone County Idaho 22.9 308.9 7.0% 3,605 11.0%
Bonner County Idaho 76.7 230.5 25.0% 8,020 31.0%
Idaho County Idaho 13.0 224.8 5.0% 1,192 34.0%
Kootenai County Idaho 18.9 128.5 13.0% 4,818 15.0%
Boundary County Idaho 11.7 119.7 9.0% 784 9.0%
Benewah County Idaho 6.9 112.4 6.0% 601 11.0%
Latah County Idaho 1.5 105.8 1.0% 135 7.0%
Valley County Idaho 6.0 60.2 9.0% 2,213 68.0%
Adams County Idaho 5.3 52.3 9.0% 267 52.0%

Click on column headers to see all data in the West sorted by that column.

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