ZIP 83421 is served primarily by Fremont County, ID — including St. Anthony. ZIP-level data is sparse — showing the Fremont County aggregate. FEMA NRI rates wildfire risk here as Very High.
Apr peaks. Oct dips. ZIP-level seasonality is sparse — this is the county aggregate.
Top 5 NFIRS incident types — county-level breakdown.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Unauthorized burning | 21 | 30.0% | |
| 2 | Brush, or brush and grass mixture fire | 9 | 12.9% | |
| 3 | Building fires | 6 | 8.6% | |
| 4 | Forest, woods or wildland fire | 6 | 8.6% | |
| 5 | Gas leak (natural gas or LPG) | 4 | 5.7% |
4 cities sit in Fremont County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | St. Anthony | 3,730 | 0 | 0 | — |
| 2 | Ashton | 1,367 | 20 | 1 | C+ |
| 3 | Teton | 909 | 2 | 1 | A+ |
| 4 | Parker | 661 | 2 | 0 | A+ |
The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.
This ZIP doesn't have enough NFIRS coverage on its own (under 10 reported incidents across 2021–2025) to publish ZIP-level statistics, so we're showing the Fremont County aggregate above. NFIRS reporting is voluntary and many rural ZIPs roll up to broader county totals. The ZIP-to-county mapping uses SimpleMaps' uscities.zips dataset.