COUNTY FATALITY DATA
O Brien County: smaller FARS fatality book
O Brien County (IA) holds a smaller FARS book (14, #2,634 of 3,137) with 0 latest-year deaths.
- 14
- Total Fatalities (2016-2022)
- 0
- Latest Year Deaths
- Low count
- 0.0%
- of Iowa road deaths
- Stable
- Trend
Smaller fatality book
O Brien County ranks #2,634 of 3,137 by total FARS fatalities (14 across 2016-2022) - bottom-third book size.
O Brien County in the smaller-book third
According to NHTSA FARS, O Brien County carries a bottom-third fatality book (14 across 2016-2022, #2,634 of 3,137) at 0 latest-year deaths.
- #2,634 of 3,137
- smaller-book third
- 9%
- of U.S. counties have fewer deaths
- Stable
- fatality trend
FARS county milepost
Milepost O-BRIEN-141 · O Brien 14 deaths
O Brien County · 0 latest · stable
- YOY 14 tot
- RATE 0 yr
- RANK 14 book
- BOOK Stable
- TREND 14 crash
- CAUSE 1.6/yr
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 → · Iowa state profile →
How does O Brien County compare?
O Brien County recorded 0 road deaths in its most recent year, 0.0% of Iowa's statewide total, more than 9% of U.S. counties by count. This county is below the 10,000-resident threshold for a population-stable per-capita rate, so figures are shown as counts.
Source: NHTSA Fatality Analysis Reporting System (FARS). Data period: 2016-2022.
More road safety data related to O Brien County
Contextual links from this profile to rankings, tools, research, and peer geographies on PlainRoadSafety.
- Iowa statewide fatality dataAll counties in this state
- Safest counties per capitaNational county rate ranking
- Deadliest states for drivingContext for IA
- State fatality changesYear-over-year state trends
- Browse all U.S. countiesAlphabetical county index
- All state profiles51 state dashboards
- State vs U.S. safety comparisonRoute-level lookup tool
- National statistics downloadFARS CSV + findings
- How to read FARS fatality dataMethodology primer
- Per-mile vs per-capita road riskRate denominator explained
- Counties starting with OLetter index including IA counties
Frequently Asked Questions
How many traffic fatalities occurred in O Brien County, Iowa?
O Brien County recorded 14 total traffic fatalities across 14 reported crashes over the data period (2016-2022). The most recent year saw 0 fatalities. The county averages approximately 1.6 fatalities per year.
What is the leading cause of road fatalities in O Brien County?
With a small recorded crash count (14), FARS does not publish an individual cause-code breakdown for O Brien County. Statewide data for Iowa may provide additional context.
Is the trend of road fatalities in O Brien County increasing or decreasing?
The trend in O Brien County is stable. Fatality counts have remained relatively consistent over the data period.
What is the fatality rate per capita in O Brien County?
Per-capita fatality rate data is not available for O Brien County (fewer than 10,000 residents). By raw count, the county is among the lowest raw death tolls of any U.S. county.
How does O Brien County compare to the rest of Iowa?
O Brien County recorded 0 deaths in its most recent year, below the Iowa county average of 4. Visit the Iowa state page for the full county-by-county breakdown.
Where does the road fatality data for O Brien 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 2016-2022 and includes all crashes resulting in at least one fatality within 30 days.