COUNTY FATALITY DATA
Cass County: higher-rate fatality band
Cass County (IA) is in the higher per-capita third: 38.1/100k (#217 of 2,328). Data period: 2016-2023.
- 34
- Total Fatalities (2016-2023)
- 5
- Latest Year Deaths
- Low count
- 38.1
- Per 100k Residents
- Well above average
- Decreasing
- Trend
Higher per-capita fatality band
Cass County ranks #217 of 2,328 by deaths per 100,000 residents (38.1/100k) - top-third rate among rated U.S. counties.
Cass County in the higher-rate third
According to NHTSA FARS, Cass County sits in the higher-rate third at 38.1 per 100k (#217 of 2,328), #4 of 68 in IA.
- #217 of 2,328
- higher-rate third
- #1,849 of 3,137
- by total FARS fatalities
- #4 of 68
- in IA by rate
- Decreasing
- fatality trend
Highway fatality milepost
Milepost CASS-29 · Cass 38.1/100k · #217 of 2,328
Cass County · 38.1/100k · decreasing
- RATE 38.1/100k
- RANK #217 of 2,328
- BOOK 34 book
- TREND Decreasing
- CAUSE 27 crash
- PHOTO +141.5% 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 Cass County compare?
2023 road deaths per 100,000 residents. Choose any comparison from the menu.
Cass County is 2.4× 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, Cass County ranks 4 for per-capita risk, above the state's own per-capita average of 15.8 per 100,000 -- nationally, this rate puts it among the most dangerous one in ten U.S. counties by that per-capita measure. The gap between Cass County's rate and the state average is 22.3 per 100,000. Its closest per-capita peer statewide is Floyd County, at 32.6 per 100,000 (a difference of 5.5). Its peer counties, highest to lowest per 100,000 residents: Louisa County (66.6), Union County (50.4), Harrison County (47.7), 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), Webster County (21.9).
Cass County's rate vs. every rated U.S. county
Deaths per 100,000 residents -- counties with 10,000+ people, NHTSA FARS over Census population
38 Higher than most a lower per-capita rate than 9% 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 Cass County
Contextual links from this profile to rankings, tools, research, and peer geographies on PlainRoadSafety.
- Cass 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 CLetter index including IA counties
Frequently Asked Questions
How many traffic fatalities occurred in Cass County, Iowa?
Cass County recorded 34 total traffic fatalities across 27 reported crashes over the data period (2016-2023). The most recent year saw 5 fatalities. The county averages approximately 3.8 fatalities per year.
What is the leading cause of road fatalities in Cass County?
Cause-code breakdowns are not individually published for Cass County in the current FARS release. Statewide data for Iowa may provide additional context.
Is the trend of road fatalities in Cass County increasing or decreasing?
The trend in Cass County is decreasing. This suggests road safety improvements are having a positive effect in the county.
What is the fatality rate per capita in Cass County?
Cass County has a fatality rate of 38.1 per 100,000 residents, which puts it among the most dangerous one in ten U.S. counties by that per-capita measure among the 3,137 U.S. counties in this dataset.
Where does Cass County rank for road fatality rate?
According to the National Highway Traffic Safety Administration Fatality Analysis Reporting System, Cass County ranks #217 of 2,328 U.S. counties by road-fatality rate per 100,000 residents (highest first) and #4 of 68 rated counties in IA, the same sort used on the deadliest-states and county rate listings. See /methodology#corpus-placement.
How does Cass County compare to the rest of Iowa?
Cass County's per-capita rate of 38.1 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 Cass 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.