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Flood in Fairfax County, Virginia
517 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
Fairfax County, Virginia, has 517 flood events in the NCEI record since 1950, with at least one in 30 different years.
July is the busiest month, with 140 of the recorded events. The last 20 years account for 479 events against 38 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 6.3% of the 8,165 flood events recorded in Virginia; its 132.2 per 100 square miles compares with 20.7 statewide.
NCEI attributes 2 deaths in the county to floods and flash floods.
Compared with Virginia
| Measure | Fairfax County | Virginia | US |
|---|---|---|---|
| Flood events since 1950 | 517 | 8,165 | 183,559 |
| Per 100 square miles | 132.2 | 20.7 | 5.2 |
| Per 10,000 residents | 4.5 | 9.4 | 5.5 |
| Deaths recorded | 2 | 64 | 2,961 |
| Busiest month | July | September | June |
By year
Seasonality
18Feb
7Mar
4Apr
22May
30Jun
58Jul
140Aug
89Sep
81Oct
27Nov
23Dec
18
Recorded events
The 176 events kept for this page are the 120 most recent plus the 80 with the most damage, deaths or injuries out of 517. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 16 Mar 2026 | Flood | — | — | — | — | — | County |
| 13 Aug 2025 | Flash Flood | — | — | — | — | — | County |
| 31 Jul 2025 | Flood | — | — | — | — | — | County |
| 31 Jul 2025 | Flood | — | — | — | — | — | County |
| 19 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 19 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 19 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 19 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 19 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 14 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 14 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 14 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 14 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 14 Jul 2025 | Flood | — | — | — | — | — | County |
| 12 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 12 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 12 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 12 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 12 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 12 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 12 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2025 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 9 May 2025 | Flood | — | — | — | — | — | County |
| 9 Aug 2024 | Flash Flood | — | — | — | — | — | County |
| 9 Aug 2024 | Flood | — | — | — | — | — | County |
| 9 Aug 2024 | Flood | — | — | — | — | — | County |
| 28 Jan 2024 | Flood | — | — | — | — | — | County |
| 28 Jan 2024 | Flood | — | — | — | — | — | County |
| 9 Jan 2024 | Flood | — | — | — | — | — | County |
| 9 Jan 2024 | Flood | — | — | — | — | — | County |
| 18 Dec 2023 | Flood | — | — | — | — | — | County |
| 17 Dec 2023 | Flood | — | — | — | — | — | County |
| 17 Dec 2023 | Flood | — | — | — | — | — | County |
| 17 Dec 2023 | Flood | — | — | — | — | — | County |
| 14 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 14 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 14 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 14 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 5 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 5 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 5 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 5 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 23 Jun 2023 | Flood | — | — | — | — | — | County |
| 22 Dec 2022 | Flood | — | — | — | — | — | County |
| 10 Aug 2022 | Flood | — | — | — | — | — | County |
| 10 Aug 2022 | Flood | — | — | — | — | — | County |
| 10 Aug 2022 | Flood | — | — | — | — | — | County |
| 10 Aug 2022 | Flood | — | — | — | — | — | County |
| 10 Aug 2022 | Flash Flood | — | — | — | — | — | County |
| 10 Aug 2022 | Flash Flood | — | — | — | — | — | County |
| 10 Aug 2022 | Flash Flood | — | — | — | — | — | County |
| 10 Aug 2022 | Flash Flood | — | — | — | — | — | County |
| 5 Aug 2022 | Flood | — | — | — | — | — | County |
| 5 Aug 2022 | Flood | — | — | — | — | — | County |
| 9 Jul 2022 | Flood | — | — | — | — | — | County |
| 9 Jul 2022 | Flash Flood | — | — | — | — | — | County |
| 23 Jun 2022 | Flood | — | — | — | — | — | County |
| 22 May 2022 | Flood | — | — | — | — | — | County |
| 7 May 2022 | Flood | — | — | — | — | — | County |
| 7 May 2022 | Flood | — | — | — | — | — | County |
| 7 May 2022 | Flood | — | — | — | — | — | County |
| 7 May 2022 | Flood | — | — | — | — | — | County |
| 4 May 2022 | Flood | — | — | — | — | — | County |
| 4 May 2022 | Flood | — | — | — | — | — | County |
| 4 May 2022 | Flood | — | — | — | — | — | County |
| 4 Feb 2022 | Flood | — | — | — | — | — | County |
| 29 Oct 2021 | Flood | — | — | — | — | — | County |
| 29 Oct 2021 | Flood | — | — | — | — | — | County |
| 29 Oct 2021 | Flood | — | — | — | — | — | County |
| 29 Oct 2021 | Flood | — | — | — | — | — | County |
| 25 Oct 2021 | Flood | — | — | — | — | — | County |
| 25 Oct 2021 | Flood | — | — | — | — | — | County |
| 25 Oct 2021 | Flood | — | — | — | — | — | County |
| 25 Oct 2021 | Flood | — | — | — | — | — | County |
| 25 Oct 2021 | Flood | — | — | — | — | — | County |
| 25 Oct 2021 | Flood | — | — | — | — | — | County |
| 25 Oct 2021 | Flood | — | — | — | — | — | County |
| 25 Oct 2021 | Flood | — | — | — | — | — | County |
| 23 Sep 2021 | Flood | — | — | — | — | — | County |
| 23 Sep 2021 | Flood | — | — | — | — | — | County |
| 23 Sep 2021 | Flood | — | — | — | — | — | County |
| 23 Sep 2021 | Flood | — | — | — | — | — | County |
| 23 Sep 2021 | Flood | — | — | — | — | — | County |
| 23 Sep 2021 | Flood | — | — | — | — | — | County |
| 16 Sep 2021 | Flood | — | — | — | — | — | County |
| 16 Sep 2021 | Flood | — | — | — | — | — | County |
| 16 Sep 2021 | Flood | — | — | — | — | — | County |
| 16 Sep 2021 | Flood | — | — | — | — | — | County |
| 16 Sep 2021 | Flood | — | — | — | — | — | County |
| 16 Sep 2021 | Flood | — | — | — | — | — | County |
| 16 Sep 2021 | Flood | — | — | — | — | — | County |
| 16 Sep 2021 | Flood | — | — | — | — | — | County |
| 16 Sep 2021 | Flood | — | — | — | — | — | County |
| 1 Sep 2021 | Flood | — | — | — | — | — | County |
| 1 Sep 2021 | Flood | — | — | — | — | — | County |
| 1 Sep 2021 | Flood | — | — | — | — | — | County |
| 1 Sep 2021 | Flood | — | — | — | — | — | County |
| 1 Sep 2021 | Flash Flood | — | — | — | — | — | County |
| 1 Sep 2021 | Flood | — | — | — | — | — | County |
| 1 Sep 2021 | Flood | — | — | — | — | — | County |
| 1 Sep 2021 | Flood | — | — | — | — | — | County |
| 27 Aug 2021 | Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flood | — | — | — | — | — | County |
| 20 Aug 2021 | Flood | — | — | — | — | — | County |
| 16 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 15 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 15 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 15 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 15 Aug 2021 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2021 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2021 | Flash Flood | — | — | — | — | — | County |
| 1 Jul 2021 | Flood | — | — | — | — | — | County |
| 1 Jul 2021 | Flood | — | — | — | — | — | County |
| 15 Jun 2021 | Flood | — | — | — | — | — | County |
| 14 Jun 2021 | Flash Flood | — | — | — | — | — | County |
| 14 Jun 2021 | Flash Flood | — | — | — | — | — | County |
| 14 Jun 2021 | Flood | — | — | — | — | — | County |
| 10 Jun 2021 | Flood | — | — | — | — | — | County |
| 16 Feb 2021 | Flood | — | — | — | — | — | County |
| 25 Dec 2020 | Flood | — | — | — | — | — | County |
| 25 Dec 2020 | Flood | — | — | — | — | — | County |
| 24 Dec 2020 | Flood | — | — | — | — | — | County |
| 24 Dec 2020 | Flood | — | — | — | — | — | County |
| 24 Dec 2020 | Flood | — | — | — | — | — | County |
| 16 Dec 2020 | Flood | — | — | — | — | — | County |
| 30 Nov 2020 | Flood | — | — | — | — | — | County |
| 30 Nov 2020 | Flood | — | — | — | — | — | County |
| 30 Nov 2020 | Flood | — | — | — | — | — | County |
| 12 Nov 2020 | Flood | — | — | — | — | — | County |
| 12 Nov 2020 | Flood | — | — | — | — | — | County |
| 12 Nov 2020 | Flood | — | — | — | — | — | County |
| 11 Nov 2020 | Flood | — | — | — | — | — | County |
| 11 Nov 2020 | Flood | — | — | — | — | — | County |
| 29 Oct 2020 | Flood | — | — | — | — | — | County |
| 29 Oct 2020 | Flood | — | — | — | — | — | County |
| 29 Oct 2020 | Flood | — | — | — | — | — | County |
| 29 Oct 2020 | Flood | — | — | — | — | — | County |
| 29 Oct 2020 | Flood | — | — | — | — | — | County |
| 10 Sep 2020 | Flash Flood | — | — | — | — | — | County |
| 28 Aug 2020 | Flood | — | — | — | — | — | County |
| 13 Aug 2020 | Flood | — | — | — | — | — | County |
| 12 Aug 2020 | Flood | — | — | — | — | — | County |
| 7 Jul 2020 | Flash Flood | — | $50K | — | — | — | County |
| 7 Jul 2020 | Flood | — | $50K | — | — | — | County |
| 8 Sep 2011 | Flash Flood | — | — | — | 1 | — | County |
| 8 Sep 2011 | Flash Flood | — | — | — | 1 | — | County |
| 18 Aug 2010 | Flash Flood | — | $25K | — | — | — | County |
| 6 Sep 2008 | Flood | — | $1K | $1K | — | — | County |
| 25 Jun 2006 | Flash Flood | — | $11M | — | — | — | County |
| 25 Jun 2006 | Flash Flood | — | $15K | — | — | — | County |
| 25 Jun 2006 | Flash Flood | — | $15K | — | — | — | County |
| 19 Jun 2006 | Flash Flood | — | $10K | — | — | — | County |
| 11 Aug 2001 | Flash Flood | — | $155K | — | — | — | County |
| 22 Jun 2001 | Flash Flood | — | $25K | — | — | — | County |
| 4 Feb 1998 | Flash Flood | — | $2K | — | — | — | County |
| 6 Sep 1996 | Flash Flood | — | $100K | $25K | — | — | County |
Questions and answers
How many flood events has Fairfax County had?
517 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Fairfax County?
16 Mar 2026 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Fairfax County?
The flash flood of 25 Jun 2006, with property damage estimated by NCEI at $11M.
How does Fairfax County compare with Virginia for flood?
132.2 events per 100 square miles against 20.7 statewide; the county holds 517 of the state's 8,165 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 30 Sep 2026. See the methodology, the Flood hub and the county page.