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Flood in Hamilton County, Indiana
79 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.
NCEI records 79 flood events in Hamilton County, Indiana, between 1950 and 2026, spread over 25 years.
June is the busiest month, with 21 of the recorded events. The last 20 years account for 52 events against 27 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.3% of the 6,083 flood events recorded in Indiana; its 20.0 per 100 square miles compares with 17.0 statewide.
NCEI attributes 4 deaths in the county to floods and flash floods.
Compared with Indiana
| Measure | Hamilton County | Indiana | US |
|---|---|---|---|
| Flood events since 1950 | 79 | 6,083 | 183,559 |
| Per 100 square miles | 20.0 | 17.0 | 5.2 |
| Per 10,000 residents | 2.2 | 8.9 | 5.5 |
| Deaths recorded | 4 | 83 | 2,961 |
| Busiest month | June | June | June |
By year
Seasonality
7Feb
4Mar
8Apr
15May
6Jun
21Jul
6Aug
4Sep
6Oct
2Nov
0Dec
0
Recorded events
All 79 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 |
|---|---|---|---|---|---|---|---|
| 4 Apr 2025 | Flash Flood | — | $100K | — | — | — | County |
| 1 Aug 2024 | Flash Flood | — | $50K | — | — | — | County |
| 11 Apr 2024 | Flood | — | $50K | — | — | — | County |
| 18 Mar 2021 | Flood | — | $1K | — | — | — | County |
| 28 Mar 2020 | Flash Flood | — | $200K | — | — | — | County |
| 28 Mar 2020 | Flash Flood | — | $5K | — | — | — | County |
| 19 Jun 2019 | Flash Flood | — | $50K | — | — | — | County |
| 19 Jun 2019 | Flash Flood | — | $50K | — | — | — | County |
| 16 Jun 2019 | Flood | — | $1K | — | — | — | County |
| 16 Jun 2019 | Flood | — | $1K | — | — | — | County |
| 7 Feb 2019 | Flood | — | $2K | — | — | — | County |
| 13 Jul 2017 | Flood | — | $500 | — | — | — | County |
| 23 Jun 2017 | Flood | — | $1K | — | — | — | County |
| 4 May 2017 | Flood | — | $1K | — | — | — | County |
| 29 Apr 2017 | Flood | — | $1K | — | — | — | County |
| 26 Aug 2016 | Flash Flood | — | $1K | — | — | — | County |
| 26 Aug 2016 | Flash Flood | — | $1K | — | — | — | County |
| 26 Jun 2015 | Flood | — | $1K | $500 | — | — | County |
| 26 Jun 2015 | Flash Flood | — | $20K | $1K | 2 | 2 | County |
| 26 Jun 2015 | Flood | — | $3K | — | — | — | County |
| 30 May 2015 | Flash Flood | — | $6K | $3K | — | — | County |
| 29 Jul 2014 | Flood | — | $1K | — | — | — | County |
| 19 Jun 2014 | Flash Flood | — | $1K | — | — | — | County |
| 3 Apr 2014 | Flood | — | $1K | — | — | — | County |
| 3 Apr 2014 | Flood | — | $10K | $1K | — | — | County |
| 3 Apr 2014 | Flood | — | $1K | — | — | — | County |
| 19 Sep 2013 | Flood | — | $1K | — | — | — | County |
| 10 Jun 2013 | Flash Flood | — | $500 | $500 | — | — | County |
| 19 Apr 2013 | Flood | — | $500 | — | — | — | County |
| 19 Apr 2013 | Flood | — | $2K | — | — | — | County |
| 19 Apr 2013 | Flood | — | $10K | — | — | — | County |
| 19 Apr 2013 | Flood | — | $500 | — | — | — | County |
| 19 Apr 2013 | Flood | — | $2K | — | — | — | County |
| 19 Apr 2013 | Flood | — | $25K | $1K | 2 | — | County |
| 9 Aug 2012 | Flood | — | $1K | — | — | — | County |
| 20 Jun 2011 | Flood | — | $500 | — | — | — | County |
| 22 Jun 2010 | Flood | — | — | — | — | — | County |
| 22 Jun 2010 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 2009 | Flash Flood | — | $1K | — | — | — | County |
| 6 Apr 2009 | Flood | — | — | — | — | — | County |
| 6 Apr 2009 | Flood | — | — | — | — | — | County |
| 12 Feb 2009 | Flood | — | $8K | — | — | — | County |
| 10 Jun 2008 | Flash Flood | — | $5K | — | — | — | County |
| 4 Jun 2008 | Flash Flood | — | $1K | — | — | — | County |
| 4 Jun 2008 | Flash Flood | — | $1K | — | — | — | County |
| 4 Jun 2008 | Flash Flood | — | $1K | — | — | — | County |
| 19 Mar 2008 | Flood | — | $15K | — | — | — | County |
| 5 Feb 2008 | Flood | — | $10K | — | — | — | County |
| 23 Mar 2007 | Flood | — | $10K | — | — | — | County |
| 23 Mar 2007 | Flood | — | — | — | — | — | County |
| 2 Mar 2007 | Flood | — | $1K | — | — | — | County |
| 15 Jan 2007 | Flood | — | $5K | — | — | — | County |
| 4 Oct 2006 | Flash Flood | — | — | — | — | — | County |
| 4 Jan 2005 | Flood | — | $25K | — | — | — | Forecast zone |
| 3 Jan 2005 | Flood | — | — | — | — | — | Forecast zone |
| 12 Jun 2004 | Flood | — | — | — | — | — | Forecast zone |
| 5 Jan 2004 | Flood | — | — | — | — | — | Forecast zone |
| 4 Jan 2004 | Flood | — | — | — | — | — | Forecast zone |
| 1 Sep 2003 | Flood | — | — | — | — | — | Forecast zone |
| 1 Sep 2003 | Flood | — | $3.0M | — | — | — | Forecast zone |
| 1 Sep 2003 | Flash Flood | — | — | — | — | — | County |
| 1 Sep 2003 | Flash Flood | — | $5.0M | — | — | — | County |
| 1 Sep 2003 | Flood | — | — | — | — | — | Forecast zone |
| 8 Jul 2003 | Flash Flood | — | — | — | — | — | County |
| 8 Jul 2003 | Flash Flood | — | — | — | — | — | County |
| 7 Jul 2003 | Flash Flood | — | — | — | — | — | County |
| 6 Jul 2003 | Flood | — | $31M | $2.0M | — | — | Forecast zone |
| 10 May 2003 | Flash Flood | — | — | — | — | — | County |
| 10 May 2003 | Flood | — | — | — | — | — | Forecast zone |
| 13 May 2002 | Flood | — | $84K | — | — | — | Forecast zone |
| 12 May 2002 | Flash Flood | — | $50K | — | — | — | County |
| 2 Feb 2002 | Flood | — | — | — | — | — | Forecast zone |
| 25 Oct 2001 | Flood | — | — | — | — | — | Forecast zone |
| 22 Jan 1999 | Flood | — | $1.7M | — | — | — | Forecast zone |
| 22 Jan 1999 | Flood | — | $25K | — | — | — | Forecast zone |
| 12 Jun 1998 | Flood | — | — | — | — | — | Forecast zone |
| 11 Jun 1998 | Flood | — | — | — | — | — | County |
| 10 Apr 1998 | Flood | — | — | — | — | — | Forecast zone |
| 14 Mar 1997 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Hamilton County had?
79 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 Hamilton County?
4 Apr 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Hamilton County?
The flood of 6 Jul 2003, with property damage estimated by NCEI at $31M and crop damage at $2.0M.
How does Hamilton County compare with Indiana for flood?
20.0 events per 100 square miles against 17.0 statewide; the county holds 79 of the state's 6,083 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.