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2025 County Report

Fires in Mercer County, MO

In 2025, fire departments serving Mercer County responded to 2 fire and hazmat incidents. FEMA NRI rates wildfire risk here as Moderate.

1,715 residents FIPS 29129 10 cities · 2 fire depts
Total incidents
2
104 across 5 years
Building fires
0
1 wildland
Property loss
$0
$0 structure · $0 contents
Casualties
0 / 0
0 civ deaths · 0 civ inj · 0 FF inj
01 The mix

What kinds of fires happen here?

Chimney or flue fire, confined to chimney or flue lead by count. Top five categories make up about 100% of all calls.

2
Total Incidents
Chimney or flue fire, confined to chimney or flue 1 50.0%
Grass fire 1 50.0%
02 Seasonality

When do fires happen in Mercer County?

Jan peaks. Feb dips.

Jan 2
Feb 0
Mar 0
Apr 0
May 0
Jun 0
Jul 0
Aug 0
Sep 0
Oct 0
Nov 0
Dec 0
03 Five-year trend

Year over year in Mercer County

104 incidents from 2021 through 2025.

YearIncidents 
2021 0
2022 34
2023 46
2024 22
2025 2
04 Cause of ignition

What sparks building fires?

For the 0 building fires departments responded to in 2025, here's how investigators classified them.

Unintentional
100%
1
Cause undetermined
0%
0
Intentional / arson
0%
0
Equipment / heat source failure
0%
0
Under investigation
0%
0
Act of nature (lightning)
0%
0
06 How Mercer County compares

Mercer County vs MO vs the nation

Per-capita rates let us compare apples to apples.

1.17
Incidents per 1,000 residents
Mercer County
1.17
MO avg
12.53
US avg
7.15
0
Building fires per 1,000 residents
Mercer County
0
MO avg
1.62
US avg
0.82
0
Civilian fire deaths per million
Mercer County
0
MO avg
9.8
US avg
5.8
07 Cities in this county

Largest cities in Mercer County

10 cities mapped to FIPS 29129.

08 First responders

Busiest fire departments in Mercer County

2 departments report from this county.

Mercer Co Fire Prot Dist
PRINCETON
FDID 06502 2 incidents 25 vol
Mercer Fire Prot Dist
Mercer
FDID 06501 0 incidents 14 vol
09 Historical wildfires

Largest fires recorded in MO

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

#NameYearAgencyAcres
1 Minninghaw 2011 USFS 4,762
2 Mud Pond 2011 USFS 3,520
3 Willie 2020 USFS 2,472
4 23 Thorny Creek BIL RX 2023 NPS 2,223
5 Carty 2015 USFS 2,145
6 Swan Creek 2019 USFS 2,119
7 Rozell 2018 USFS 2,102
8 Devreaux 2023 USFS 2,028
9 Liberty 2012 USFS 1,623
10 Sugar 2024 USFS 1,611

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.