ZIP 37657 is served primarily by Unicoi County, TN — including Erwin. ZIP-level data is sparse — showing the Unicoi County aggregate.
Mar peaks. Jun dips. ZIP-level seasonality is sparse — this is the county aggregate.
Top 5 NFIRS incident types — county-level breakdown.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Fire, other | 12 | 15.8% | |
| 2 | Gas leak (natural gas or LPG) | 8 | 10.5% | |
| 3 | Building fires | 7 | 9.2% | |
| 4 | Outside rubbish fire, other | 6 | 7.9% | |
| 5 | Brush, or brush and grass mixture fire | 5 | 6.6% |
3 cities sit in Unicoi County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Erwin | 6,026 | 49 | 5 | B |
| 2 | Unicoi | 3,802 | 26 | 2 | A |
| 3 | Banner Hill | 1,571 | 0 | 0 | — |
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 Unicoi 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.