1 appeal window open
Flood map changes in Montana
Since November 2023, FEMA has published flood hazard notices covering 9 of Montana's 56 counties.
| County | Notices | Most recent | Appeal window |
|---|---|---|---|
| Powell County | 1 | Aug 21, 2026 | Open until Nov 19, 2026 |
| Madison County | 2 | Jul 9, 2026 | — |
| Jefferson County | 1 | Jul 9, 2025 | — |
| Granite County | 4 | Apr 4, 2025 | — |
| Gallatin County | 2 | Sep 12, 2024 | — |
| Broadwater County | 1 | Jun 7, 2024 | — |
| Lewis and Clark County | 2 | Apr 29, 2024 | — |
| Mineral County | 1 | Dec 26, 2023 | — |
| Wheatland County | 1 | Nov 3, 2023 | — |
All counties in Montana
- Beaverhead County
- Big Horn County
- Blaine County
- Broadwater County
- Carbon County
- Carter County
- Cascade County
- Chouteau County
- Custer County
- Daniels County
- Dawson County
- Deer Lodge County
- Fallon County
- Fergus County
- Flathead County
- Gallatin County
- Garfield County
- Glacier County
- Golden Valley County
- Granite County
- Hill County
- Jefferson County
- Judith Basin County
- Lake County
- Lewis and Clark County
- Liberty County
- Lincoln County
- Madison County
- McCone County
- Meagher County
- Mineral County
- Missoula County
- Musselshell County
- Park County
- Petroleum County
- Phillips County
- Pondera County
- Powder River County
- Powell County
- Prairie County
- Ravalli County
- Richland County
- Roosevelt County
- Rosebud County
- Sanders County
- Sheridan County
- Silver Bow County
- Stillwater County
- Sweet Grass County
- Teton County
- Toole County
- Treasure County
- Valley County
- Wheatland County
- Wibaux County
- Yellowstone 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