3,450
Recorded events
87
Counties affected
27
Direct deaths
$393.1M
Property damage
Ohio flood history: 3,450 recorded events across 87 counties between 1996 and 2026.
Decade by decade
Ohio flood history by decade
The 2010s are the busiest decade on record with 1,224 reported flood events across Ohio. Earlier decades are thinner because systematic reporting for this hazard expanded over time, not because the weather was calmer.
County ranking
Counties with the most flood events in Ohio
| Rank | County | Events | Deaths | Damage | Span |
|---|---|---|---|---|---|
| #1 | Washington County | 167 | 1 | $486K | 2008–2026 |
| #2 | Meigs County | 75 | 1 | $1.0M | 2007–2026 |
| #3 | Franklin County | 74 | 0 | $143K | 2007–2026 |
| #4 | Warren County | 70 | 3 | $395K | 2007–2025 |
| #5 | Athens County | 69 | 0 | $383K | 2008–2026 |
| #6 | Scioto County | 67 | 1 | $56K | 2008–2025 |
| #7 | Hamilton County | 62 | 0 | $146K | 2007–2025 |
| #8 | Mercer County | 59 | 0 | $474K | 2006–2026 |
| #9 | Hocking County | 54 | 0 | $63K | 2006–2026 |
| #10 | Vinton County | 53 | 0 | $255K | 2008–2026 |
| #11 | Gallia County | 52 | 1 | $238K | 2007–2025 |
| #12 | Ross County | 52 | 1 | $31K | 2008–2025 |
| #13 | Montgomery County | 49 | 0 | $32K | 2006–2026 |
| #14 | Lawrence County | 48 | 1 | $3.5M | 2000–2025 |
| #15 | Licking County | 47 | 0 | $68K | 2007–2025 |
| #16 | Shelby County | 47 | 0 | $43K | 2006–2025 |
| #17 | Logan County | 45 | 0 | $90K | 2006–2024 |
| #18 | Greene County | 45 | 0 | $29K | 2007–2026 |
| #19 | Noble County | 45 | 0 | $79K | 2008–2024 |
| #20 | Brown County | 41 | 0 | $33K | 2008–2025 |
| #21 | Auglaize County | 40 | 0 | $314K | 2006–2024 |
| #22 | Clark County | 38 | 0 | $237K | 2007–2025 |
| #23 | Fairfield County | 38 | 0 | $37K | 2006–2026 |
| #24 | Darke County | 37 | 0 | $40K | 2006–2025 |
| #25 | Pickaway County | 36 | 0 | $15K | 2007–2026 |
Significant events
Deadliest flood events in Ohio
| Date | County | Scale | Deaths | Injuries |
|---|---|---|---|---|
| Jun 9, 2010 | Clermont County | — | 2 | 0 |
| May 2, 2010 | Morgan County | — | 2 | 0 |
| Mar 11, 2009 | Putnam County | — | 1 | 0 |
| Jul 13, 2006 | Wyandot County | — | 1 | 0 |
| Mar 19, 2008 | Clinton County | — | 1 | 0 |
| Mar 1, 2018 | Ross County | — | 1 | 0 |
| Feb 13, 2020 | Gallia County | — | 1 | 0 |
| May 11, 2011 | Scioto County | — | 1 | 0 |
| Jul 11, 2000 | Lawrence County | — | 1 | 0 |
| Dec 22, 2013 | Seneca County | — | 1 | 0 |