Home› Counties› OH› Warren County
2025 County Report

Fires in Warren County, OH

In 2025, fire departments serving Warren County responded to 1,431 fire and hazmat incidents — including a single $800K property loss.

124,837 residents FIPS 39165 45 cities · 0 fire depts
Total incidents
1,431
7,604 across 5 years
Building fires
342
126 wildland
Property loss
$5.4M
$4.0M structure · $1.4M contents
Casualties
0 / 4
0 civ deaths · 3 civ inj · 1 FF inj
01 The mix

What kinds of fires happen here?

Building fires lead by count. Top five categories make up about 55% of all calls.

1,431
Total Incidents
Building fires 342 23.9%
Gas leak (natural gas or LPG) 153 10.7%
Power line down 102 7.1%
Brush, or brush and grass mixture fire 96 6.7%
Electrical wiring/equipment problem, other 89 6.2%
All other categories 649 45.4%
02 Seasonality

When do fires happen in Warren County?

Apr peaks. Jun dips.

Jan 139
Feb 121
Mar 153
Apr 174
May 107
Jun 59
Jul 100
Aug 145
Sep 117
Oct 126
Nov 131
Dec 59
03 Five-year trend

Year over year in Warren County

7,604 incidents from 2021 through 2025.

YearIncidents 
2021 1,077
2022 1,620
2023 1,645
2024 1,831
2025 1,431
04 Cause of ignition

What sparks building fires?

For the 342 building fires departments responded to in 2025, here's how investigators classified them.

Unintentional
41%
109
Cause undetermined
27%
71
Intentional / arson
14%
37
Equipment / heat source failure
9%
24
Under investigation
4%
11
Act of nature (lightning)
5%
9
05 The biggest fires

10 fires · $3.0M in losses

Largest single-incident property losses in Warren County during 2025. These 10 fires alone account for 75% of the county's total.

#Property lossCityTypeSeverity
1 $800,000 Hamilton Twp Building fires Major
2 $510,400 Springboro Building fires Major
3 $500,000 Deerfield Twp Building fires Major
4 $300,000 Mason Building fires Major
5 $200,000 Deerfield Twp Building fires Significant
6 $200,000 Deerfield Twp Building fires Significant
7 $150,000 Butlerville Building fires Significant
8 $147,940 Franklin Building fires Significant
9 $123,000 Franklin Building fires Significant
10 $100,000 Springboro Hazardous condition, other Significant
06 How Warren County compares

Warren County vs OH vs the nation

Per-capita rates let us compare apples to apples.

11.46
Incidents per 1,000 residents
Warren County
11.46
OH avg
11.07
US avg
7.15
2.74
Building fires per 1,000 residents
Warren County
2.74
OH avg
1.95
US avg
0.82
0
Civilian fire deaths per million
Warren County
0
OH avg
10.3
US avg
5.8
07 Cities in this county

Largest cities in Warren County

12 cities mapped to FIPS 39165.

CityPopulation 
Mason 34,768 View ›
Lebanon 20,999 View ›
Springboro 19,218 View ›
Franklin 11,672 View ›
Landen 8,149 View ›
South Lebanon 6,376 View ›
Carlisle 5,488 View ›
Hunter 4,304 View ›
Waynesville 2,709 View ›
Morrow 2,338 View ›
Maineville 2,057 View ›
Loveland Park 1,824 View ›
09 Historical wildfires

Largest fires recorded in OH

Top 10 fire perimeters by acres burned (state-scoped fallback while we build out per-county polygons).

#NameYearAgencyAcres
1 OHOTR-FY19-RX-Blausey Spring 2019 WUI 2019 FWS 125
2 Little Storm Creek 2020 USFS 122
3 GREEN 2015 USFS 109
4 THIRTEEN 2018 USFS 105
5 Terra Vista Prescribe Fire 2021 NPS 79
6 Lawco 2023 USFS 61
7 128 2021 USFS 51
8 FY23 NERI RX Burns 2022 NPS 40
9 Rock Hollow 2023 USFS 29
10 HOADLEY 2018 USFS 24

About this data

County-level NFIRS aggregates for 2025, plus 5-year totals across 2021–2025. NFIRS is voluntary — about 23,000 of roughly 30,000 US fire departments report — so totals are a strong indicator, not a complete census. Wildfire risk score (0–100) and Expected Annual Loss come from FEMA's National Risk Index. Drought class is the most recent USDM classification (D0 = abnormally dry through D4 = exceptional drought). Historical fire perimeters are sourced from the NIFC InterAgency Fire Perimeter History.