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Flood in Oneida County, Wisconsin
12 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.
Oneida County, Wisconsin, has 12 flood events in the NCEI record since 1950, with at least one in 7 different years.
July is the busiest month, with 6 of the recorded events. The last 20 years account for 1 events against 11 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.5% of the 2,580 flood events recorded in Wisconsin; its 1.1 per 100 square miles compares with 4.8 statewide.
Compared with Wisconsin
| Measure | Oneida County | Wisconsin | US |
|---|---|---|---|
| Flood events since 1950 | 12 | 2,580 | 183,559 |
| Per 100 square miles | 1.1 | 4.8 | 5.2 |
| Per 10,000 residents | 3.1 | 4.4 | 5.5 |
| Deaths recorded | 0 | 30 | 2,961 |
| Busiest month | July | June | June |
By year
Seasonality
0Feb
0Mar
1Apr
3May
0Jun
0Jul
6Aug
0Sep
1Oct
1Nov
0Dec
0
Recorded events
All 12 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 17 Oct 2016 | Flood | — | — | — | — | — | County |
| 31 Mar 2005 | Flood | — | — | — | — | — | Forecast zone |
| 26 Jul 2003 | Flash Flood | — | — | — | — | — | County |
| 18 Apr 2002 | Flood | — | $16K | — | — | — | County |
| 11 Apr 2002 | Flash Flood | — | — | — | — | — | County |
| 6 Sep 2001 | Flood | — | — | — | — | — | County |
| 9 Jul 2000 | Flood | — | — | — | — | — | Forecast zone |
| 8 Jul 2000 | Flood | — | — | — | — | — | County |
| 8 Jul 2000 | Flood | — | — | — | — | — | County |
| 8 Jul 2000 | Flash Flood | — | $180K | — | — | — | County |
| 2 Jul 2000 | Flood | — | — | — | — | — | County |
| 19 Apr 1996 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Oneida County had?
12 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 Oneida County?
17 Oct 2016 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Oneida County?
The flash flood of 8 Jul 2000, with property damage estimated by NCEI at $180K.
How does Oneida County compare with Wisconsin for flood?
1.1 events per 100 square miles against 4.8 statewide; the county holds 12 of the state's 2,580 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 1 Oct 2026. See the methodology, the Flood hub and the county page.