ZIP 20177 is served primarily by Loudoun County, VA — including Leesburg. ZIP-level data is sparse — showing the Loudoun County aggregate.
Mar peaks. Nov dips. ZIP-level seasonality is sparse — this is the county aggregate.
Top 5 NFIRS incident types — county-level breakdown.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Gas leak (natural gas or LPG) | 488 | 30.7% | |
| 2 | Hazardous condition, other | 156 | 9.8% | |
| 3 | Vehicle accident, general cleanup | 93 | 5.9% | |
| 4 | Power line down | 69 | 4.3% | |
| 5 | Building fires | 63 | 4.0% |
25 cities sit in Loudoun County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Leesburg | 48,465 | 361 | 8 | A |
| 2 | Ashburn | 45,479 | 361 | 15 | B |
| 3 | South Riding | 33,358 | 0 | 0 | A+ |
| 4 | Sterling | 31,058 | 282 | 17 | B+ |
| 5 | Brambleton | 22,796 | 0 | 0 | — |
| 6 | Stone Ridge | 16,049 | 0 | 0 | — |
| 7 | Broadlands | 14,582 | 0 | 0 | — |
| 8 | Lansdowne | 12,840 | 0 | 0 | — |
| 9 | Sugarland Run | 12,818 | 0 | 0 | — |
| 10 | Cascades | 12,542 | 0 | 0 | — |
| 11 | Lowes Island | 11,265 | 0 | 0 | — |
| 12 | Loudoun Valley Estates | 10,514 | 0 | 0 | — |
| 13 | Belmont | 9,888 | 0 | 0 | — |
| 14 | Countryside | 9,646 | 0 | 0 | — |
| 15 | Purcellville | 8,928 | 134 | 8 | B |
| 16 | Dulles Town Center | 5,884 | 0 | 0 | — |
| 17 | University Center | 4,223 | 0 | 0 | — |
| 18 | One Loudoun | 2,779 | 0 | 0 | — |
| 19 | Lovettsville | 2,666 | 68 | 3 | B- |
| 20 | Oak Grove | 2,533 | 12 | 1 | A |
| 21 | Arcola | 2,437 | 0 | 0 | — |
| 22 | Goose Creek Village | 2,332 | 0 | 0 | — |
| 23 | Hamilton | 674 | 31 | 0 | C |
| 24 | Round Hill | 668 | 39 | 0 | C |
| 25 | Middleburg | 643 | 39 | 1 | C- |
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 Loudoun 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.