ZIP 51011 is served primarily by Sioux County, IA — including Sioux Center. ZIP-level data is sparse — showing the Sioux County aggregate.
Apr peaks. Dec dips. ZIP-level seasonality is sparse — this is the county aggregate.
Top 5 NFIRS incident types — county-level breakdown.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Building fires | 47 | 21.6% | |
| 2 | Grass fire | 36 | 16.5% | |
| 3 | Cultivated grain or crop fire | 21 | 9.6% | |
| 4 | Fire, other | 19 | 8.7% | |
| 5 | Vehicle accident, general cleanup | 10 | 4.6% |
9 cities sit in Sioux County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Sioux Center | 8,227 | 40 | 14 | A |
| 2 | Orange City | 6,278 | 59 | 17 | A |
| 3 | Rock Valley | 4,045 | 8 | 2 | A- |
| 4 | Hawarden | 2,673 | 30 | 2 | A- |
| 5 | Hull | 2,340 | 3 | 2 | A+ |
| 6 | Alton | 1,283 | 16 | 5 | B |
| 7 | Hospers | 941 | 21 | 3 | C+ |
| 8 | Boyden | 719 | 16 | 1 | B- |
| 9 | Ireton | 550 | 5 | 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 Sioux 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.