How many traffic fatalities occurred in St Louis County, Missouri?

St Louis County recorded 718 total traffic fatalities across 656 reported crashes over the data period (2016-2023). The most recent year saw 99 fatalities. The county averages approximately 79.8 fatalities per year.

What is the leading cause of road fatalities in St Louis County?

Despite a comparatively active crash history (656 recorded crashes), individual cause-code breakdowns are not published for St Louis County in the current FARS release. Statewide data for Missouri may provide additional context.

Is the trend of road fatalities in St Louis County increasing or decreasing?

The trend in St Louis County is increasing. This indicates that traffic fatalities have risen over the data period, warranting attention to road safety initiatives.

What is the fatality rate per capita in St Louis County?

St Louis County has a fatality rate of 10.0 per 100,000 residents, which leaves it safer than most U.S. counties by that per-capita measure among the 3,137 U.S. counties in this dataset.

How does St Louis County compare to the rest of Missouri?

St Louis County's per-capita rate of 10.0 per 100,000 residents is below the Missouri county average of 21.8. Visit the Missouri state page for the full county-by-county breakdown.

Where does the road fatality data for St Louis County come from?

All road fatality data comes from the NHTSA Fatality Analysis Reporting System (FARS), a census of fatal motor vehicle crashes on public roads in the United States. FARS data covers the period 2016-2023 and includes all crashes resulting in at least one fatality within 30 days.

COUNTY FATALITY DATA

St Louis County, Missouri

Road fatality data for St Louis County (MO). Data period: 2016-2023.

Compiled by PlainRoadSafety · August 9, 2026

718
Total Fatalities (2016-2023): 99
Latest Year Deaths: 10.0
Per 100k Residents: Increasing
Trend

The verdict

According to the National Highway Traffic Safety Administration Fatality Analysis Reporting System, St Louis County ranks #1,764 of 2,328 U.S. counties by road-fatality rate per 100,000 residents (highest first) and #70 of 84 rated counties in MO. St Louis County's fatality rate of 10.0 per 100,000 residents leaves it safer than most U.S. counties by that per-capita measure.

#1,764 of 2,328
national by fatality rate: #70 of 84
in MO by rate: 76%
of rated U.S. counties are deadlier per capita: Increasing
fatality trend

FARS county milepost

Milepost ST-LOUIS-189 · St Louis 10.0/100k · #1,764 of 2,328

St Louis County · 10.0/100k · increasing · cause n/a

RANK 10.0/100k
BOOK #1,764 of 2,328
TREND 718 book
CAUSE Increasing
PHOTO near Webb
VS-ST -54.1% vs MO

Stamps derive from this county's NHTSA FARS row (per-100k or book, corpus rank, trend, nationwide peer NAME, vs-state gap), not a trip-risk forecast. PlainRoadSafety is informational only. See our disclaimer. Verify with NHTSA FARS → · Read with methodology → · Understanding road fatality data → · Missouri state profile →

Allen

10
Collier

10
Milwaukee

10
St Louis

10
Webb

10

What this shows St Louis County sits among nearest nationwide per-capita peers.

How does St Louis County compare?

2023 road deaths per 100,000 residents. Choose any comparison from the menu.

Compare with

St Louis County

10.0 per 100k

Missouri county average

21.8 per 100k

St Louis County is 54% safer than the comparison

2023 road deaths from the NHTSA Fatality Analysis Reporting System over population from the U.S. Census Bureau Population Estimates Program (Vintage 2023). Rates shown for counties with 10,000+ residents and a 2023 FARS record.

Among the 15 rated counties in Missouri, St Louis County ranks 15 for per-capita risk, below the state's own per-capita average of 21.8 per 100,000 -- nationally, this rate leaves it safer than most U.S. counties by that per-capita measure. The gap between St Louis County's rate and the state average is 11.8 per 100,000. Its closest per-capita peer statewide is Lafayette County, at 30.1 per 100,000 (a difference of 20.1). Its peer counties, highest to lowest per 100,000 residents: Ripley County (74.0), Pemiscot County (54.7), Morgan County (54.6), Barry County (53.9), Lawrence County (51.5), Douglas County (49.1), Ralls County (47.7), Bates County (43.1), New Madrid County (38.9), Bollinger County (37.9), Saline County (34.7), Stone County (33.7), Wright County (30.9), Lafayette County (30.1).

St Louis County's rate vs. every rated U.S. county

Deaths per 100,000 residents -- counties with 10,000+ people, NHTSA FARS over Census population

10 Among the safer counties a lower per-capita rate than 76% of 2,328 rated counties

rated U.S. counties, bucketed by value

Each bar is a band; taller bars hold more rated counties. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source NHTSA FARS over U.S. Census Bureau population estimates · 2026-08-09

St Louis County's rate vs. the Missouri state average

← Back to Missouri All States

Source: NHTSA Fatality Analysis Reporting System (FARS) This information is for research and informational purposes only

Read our methodology - how this data is sourced, computed, and verified.

Counties with similar FARS profiles

Two cross-state peer sets for St Louis County. Same-state rate comparisons stay in the chart above; these neighborhoods are nearest other-state counties with population at least 250,000.

Similar per-capita fatality rate

Nearest counties by deaths per 100,000 residents (10.0 here), outside Missouri.

Webb County 10.0 /100k · TX Allen County 9.9 /100k · IN Collier County 9.9 /100k · FL Milwaukee County 9.9 /100k · WI

Similar fatality volume

Nearest counties by recorded FARS deaths (718 here), excluding the rate-peer set.

Oklahoma County 727 deaths · OK Brevard County 741 deaths · FL Stanislaus County 690 deaths · CA Marion County 747 deaths · FL

Verify with NHTSA FARS →

Verify with FHWA →

Source and method. PlainRoadSafety is rendered directly from the National Highway Traffic Safety Administration Fatality Analysis Reporting System (FARS). PlainRoadSafety aggregates published FARS records and does not invent a fatality count the census does not report. County figures are computed directly from NHTSA FARS census data, no figure is typed in by an editor. See our Editorial & Corrections Policy, the methodology behind these numbers, or Report a correction. Data current as of October 2024.