FEMA flood map notices
Flood map changes in Idaho
Since November 2023, FEMA has published flood hazard notices covering 17 of Idaho's 44 counties.
| County | Notices | Most recent | Appeal window |
|---|---|---|---|
| Ada County | 18 | Sep 10, 2026 | — |
| Bonner County | 2 | Sep 10, 2026 | — |
| Canyon County | 14 | Sep 10, 2026 | — |
| Clearwater County | 2 | Aug 6, 2026 | — |
| Nez Perce County | 2 | Aug 6, 2026 | — |
| Kootenai County | 1 | Jul 9, 2026 | — |
| Bingham County | 3 | Jun 11, 2026 | — |
| Custer County | 2 | Jun 11, 2026 | — |
| Lemhi County | 6 | Jun 11, 2026 | — |
| Teton County | 2 | May 18, 2026 | — |
| Blaine County | 7 | Jan 29, 2026 | — |
| Elmore County | 4 | Oct 2, 2025 | — |
| Shoshone County | 2 | Aug 20, 2025 | — |
| Lincoln County | 2 | Aug 12, 2024 | — |
| Bannock County | 2 | May 31, 2024 | — |
| Bonneville County | 4 | May 31, 2024 | — |
| Madison County | 1 | Jan 5, 2024 | — |
All counties in Idaho
- Ada County
- Adams County
- Bannock County
- Bear Lake County
- Benewah County
- Bingham County
- Blaine County
- Boise County
- Bonner County
- Bonneville County
- Boundary County
- Butte County
- Camas County
- Canyon County
- Caribou County
- Cassia County
- Clark County
- Clearwater County
- Custer County
- Elmore County
- Franklin County
- Fremont County
- Gem County
- Gooding County
- Idaho County
- Jefferson County
- Jerome County
- Kootenai County
- Latah County
- Lemhi County
- Lewis County
- Lincoln County
- Madison County
- Minidoka County
- Nez Perce County
- Oneida County
- Owyhee County
- Payette County
- Power County
- Shoshone County
- Teton County
- Twin Falls County
- Valley County
- Washington County
What these notices mean
- Proposed
- FEMA has new draft flood maps. This starts a 90-day window when owners can appeal with technical data. It's the best time to act.
- Final
- Appeals are resolved. The new maps usually take effect about six months later, when lenders start applying the new zones.
- Map revision
- A Letter of Map Revision changes one stretch of the map, often after a levee, channel project or new survey.
Notices are organized by county and community, so a notice for your county doesn't mean your property is changing zones. What flood zones mean