COUNTY FATALITY DATA
Plymouth County, Iowa
Road fatality data for Plymouth County (IA). Data period: 2016-2023.
- 33
- Total Fatalities (2016-2023)
- 5
- Latest Year Deaths
- Low count
- 19.4
- Per 100k Residents
- Near average
- Increasing
- Trend
Rising fatality trend
Plymouth County's FARS series is labeled Increasing with 5 deaths in the latest year.
Plymouth County on a rising FARS trend
According to the National Highway Traffic Safety Administration Fatality Analysis Reporting System, Plymouth County ranks #887 of 2,328 U.S. counties by road-fatality rate per 100,000 residents (highest first) and #18 of 68 rated counties in IA. Plymouth County's fatality rate of 19.4 per 100,000 residents places it close to the national middle by that per-capita measure.
- #887 of 2,328
- among rated U.S. counties by rate
- #1,904 of 3,137
- by total FARS fatalities
- #18 of 68
- in IA by rate
- Increasing
- fatality trend
FARS county milepost
Milepost PLYMOUTH-149 · Plymouth 19.4/100k · #887 of 2,328
Plymouth County · 19.4/100k · increasing
- TREND 19.4/100k
- CAUSE #887 of 2,328
- PHOTO 33 book
- VS-ST Increasing
- CRASH 31 crash
- FARS +23.0% vs IA
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 Plymouth County compare?
2023 road deaths per 100,000 residents. Choose any comparison from the menu.
Plymouth County is 23% deadlier 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 Iowa, Plymouth County ranks 15 for per-capita risk, above the state's own per-capita average of 15.8 per 100,000 -- nationally, this rate places it close to the national middle by that per-capita measure. The gap between Plymouth County's rate and the state average is 3.6 per 100,000. Its closest per-capita peer statewide is Madison County, at 23.6 per 100,000 (a difference of 4.2). Its peer counties, highest to lowest per 100,000 residents: Louisa County (66.6), Union County (50.4), Harrison County (47.7), Cass County (38.1), Floyd County (32.6), Grundy County (32.3), Iowa County (30.5), Cedar County (27.3), Poweshiek County (27.1), Page County (26.6), Boone County (26.3), Winneshiek County (25.2), Wright County (23.7), Madison County (23.6).
Plymouth County's rate vs. every rated U.S. county
Deaths per 100,000 residents -- counties with 10,000+ people, NHTSA FARS over Census population
19 Around the middle a lower per-capita rate than 38% 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 · 2026-09-03
More road safety data related to Plymouth County
Contextual links from this profile to rankings, tools, research, and peer geographies on PlainRoadSafety.
- Plymouth County vs other counties by ratePer-100k fatality comparison
- Iowa statewide fatality dataAll counties in this state
- 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 PLetter index including IA counties
Frequently Asked Questions
How many traffic fatalities occurred in Plymouth County, Iowa?
Plymouth County recorded 33 total traffic fatalities across 31 reported crashes over the data period (2016-2023). The most recent year saw 5 fatalities. The county averages approximately 3.7 fatalities per year.
What is the leading cause of road fatalities in Plymouth County?
Cause-code breakdowns are not individually published for Plymouth County in the current FARS release. Statewide data for Iowa may provide additional context.
Is the trend of road fatalities in Plymouth County increasing or decreasing?
The trend in Plymouth 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 Plymouth County?
Plymouth County has a fatality rate of 19.4 per 100,000 residents, which places it close to the national middle by that per-capita measure among the 3,137 U.S. counties in this dataset.
Where does Plymouth County rank for road fatality rate?
According to the National Highway Traffic Safety Administration Fatality Analysis Reporting System, Plymouth County ranks #887 of 2,328 U.S. counties by road-fatality rate per 100,000 residents (highest first) and #18 of 68 rated counties in IA, the same sort used on the deadliest-states and county rate listings. See /methodology#corpus-placement.
How does Plymouth County compare to the rest of Iowa?
Plymouth County's per-capita rate of 19.4 per 100,000 residents is above the Iowa county average of 15.8. Visit the Iowa state page for the full county-by-county breakdown.
Where does the road fatality data for Plymouth 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.