ZIP 21709 is served primarily by Frederick County, MD — including Frederick. ZIP-level data is sparse — showing the Frederick County aggregate.
Mar 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 | Power line down | 339 | 19.3% | |
| 2 | Gas leak (natural gas or LPG) | 262 | 14.9% | |
| 3 | Building fires | 122 | 6.9% | |
| 4 | Arcing, shorted electrical equipment | 93 | 5.3% | |
| 5 | Brush, or brush and grass mixture fire | 90 | 5.1% |
22 cities sit in Frederick County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Frederick | 78,390 | 912 | 38 | B- |
| 2 | Ballenger Creek | 24,325 | 0 | 0 | — |
| 3 | Urbana | 13,373 | 0 | 0 | A+ |
| 4 | Green Valley | 12,980 | 1 | 1 | A+ |
| 5 | Linganore | 11,870 | 0 | 0 | — |
| 6 | Brunswick | 7,781 | 63 | 7 | A- |
| 7 | Thurmont | 6,313 | 129 | 11 | B- |
| 8 | Walkersville | 6,239 | 44 | 6 | A- |
| 9 | Spring Ridge | 5,691 | 0 | 0 | — |
| 10 | Middletown | 4,978 | 85 | 3 | B |
| 11 | Monrovia | 2,980 | 37 | 2 | B+ |
| 12 | Braddock Heights | 2,857 | 0 | 0 | A+ |
| 13 | Emmitsburg | 2,818 | 77 | 11 | C+ |
| 14 | Jefferson | 2,742 | 29 | 1 | B |
| 15 | Myersville | 2,493 | 72 | 3 | C- |
| 16 | Adamstown | 2,394 | 36 | 2 | C+ |
| 17 | Bartonsville | 2,373 | 0 | 0 | — |
| 18 | Point of Rocks | 2,360 | 13 | 1 | A |
| 19 | New Market | 1,534 | 57 | 2 | C |
| 20 | Libertytown | 1,275 | 8 | 4 | A |
| 21 | Woodsboro | 1,240 | 24 | 4 | B |
| 22 | Buckeystown | 1,235 | 0 | 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 Frederick 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.