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2025 County Report

Fires in Williamson County, IL

In 2025, fire departments serving Williamson County responded to 1,001 fire and hazmat incidents — including a single $395K property loss.

45,750 residents FIPS 17199 35 cities · 10 fire depts
Total incidents
1,001
4,382 across 5 years
Building fires
141
114 wildland
Property loss
$4.2M
$3.1M structure · $1.2M contents
Casualties
0 / 3
0 civ deaths · 3 civ inj · 0 FF inj
01 The mix

What kinds of fires happen here?

Building fires lead by count. Top five categories make up about 53% of all calls.

1,001
Total Incidents
Building fires 141 14.1%
Power line down 129 12.9%
Hazardous condition, other 113 11.3%
Gas leak (natural gas or LPG) 82 8.2%
Outside rubbish, trash or waste fire 63 6.3%
All other categories 473 47.3%
02 Seasonality

When do fires happen in Williamson County?

Jan peaks. May dips.

Jan 253
Feb 58
Mar 150
Apr 86
May 42
Jun 57
Jul 53
Aug 59
Sep 74
Oct 49
Nov 64
Dec 56
03 Five-year trend

Year over year in Williamson County

4,382 incidents from 2021 through 2025.

YearIncidents 
2021 751
2022 892
2023 863
2024 875
2025 1,001
04 Cause of ignition

What sparks building fires?

For the 141 building fires departments responded to in 2025, here's how investigators classified them.

Unintentional
38%
78
Cause undetermined
23%
48
Intentional / arson
11%
22
Equipment / heat source failure
10%
20
Under investigation
14%
30
Act of nature (lightning)
4%
5
05 The biggest fires

10 fires · $1.6M in losses

Largest single-incident property losses in Williamson County during 2025. These 10 fires alone account for 51% of the county's total.

#Property lossCityTypeSeverity
1 $394,600 Marion Building fires Major
2 $248,460 Carterville Building fires Significant
3 $210,000 Energy Building fires Significant
4 $200,000 Energy Building fires Significant
5 $100,000 MARION Road freight or transport vehicle fire Significant
6 $100,000 Herrin Building fires Significant
7 $90,000 MARION Building fires Significant
8 $75,000 Carterville Building fires Significant
9 $75,000 MARION Building fires Significant
10 $70,000 Carterville Fire in motor home, camper, recreational vehicle Significant
06 How Williamson County compares

Williamson County vs IL vs the nation

Per-capita rates let us compare apples to apples.

21.88
Incidents per 1,000 residents
Williamson County
21.88
IL avg
10.42
US avg
7.15
3.08
Building fires per 1,000 residents
Williamson County
3.08
IL avg
1.56
US avg
0.82
0
Civilian fire deaths per million
Williamson County
0
IL avg
9.9
US avg
5.8
07 Cities in this county

Largest cities in Williamson County

12 cities mapped to FIPS 17199.

08 First responders

Busiest fire departments in Williamson County

10 departments report from this county.

MARION FD
Marion
FDID WH201 287 incidents 25 paid
HERRIN FD
—
FDID WH172 197 incidents 11 paid
WILLIAMSON COUNTY FPD
Herrin
FDID WH252 192 incidents 4 paid 65 vol
JOHNSTON CITY FD
JOHNSTON CITY
FDID WH192 117 incidents 9 paid
CARTERVILLE FD
—
FDID WH122 92 incidents 4 paid
09 Historical wildfires

Largest fires recorded in IL

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

#NameYearAgencyAcres
1 Red Shale RX 2024 FWS 1,290
2 Herrin Flats RX 2024 FWS 1,134
3 Beach RX 2024 FWS 864
4 Hampton North RX 2024 FWS 708
5 Hampton RX 2024 FWS 668
6 Grassy Creek 2 RX 2024 FWS 621
7 Chamness RX 2024 FWS 610
8 Greenbriar RX 2024 FWS 590
9 COR - Devils Kitchen West RX 2024 FWS 468
10 Smith RX 2024 FWS 366

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.