COUNTY FATALITY DATA
Jefferson County, Idaho
Road fatality data for Jefferson County (ID). Data period: 2016-2023.
- 30
- Total Fatalities (2016-2023)
- 8
- Latest Year Deaths
- Near average count
- 23.4
- Per 100k Residents
- Above average
- Increasing
- Trend
Rising fatality trend
Jefferson County's FARS series is labeled Increasing with 8 deaths in the latest year.
Jefferson County on a rising FARS trend
According to the National Highway Traffic Safety Administration Fatality Analysis Reporting System, Jefferson County ranks #660 of 2,328 U.S. counties by road-fatality rate per 100,000 residents (highest first) and #12 of 30 rated counties in ID. Jefferson County's fatality rate of 23.4 per 100,000 residents leaves it more dangerous than most U.S. counties by that per-capita measure.
- #660 of 2,328
- higher-rate third
- #2,001 of 3,137
- by total FARS fatalities
- #12 of 30
- in ID by rate
- Increasing
- fatality trend
NHTSA county milepost
Milepost JEFFERSON-51 · Jefferson 23.4/100k · #660 of 2,328
Jefferson County · 23.4/100k · increasing
- CRASH 23.4/100k
- FARS #660 of 2,328
- NHTSA 30 book
- MILE Increasing
- POST 28 crash
- BAND +10.4% vs ID
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 → · Idaho state profile →
How does Jefferson County compare?
2023 road deaths per 100,000 residents. Choose any comparison from the menu.
Jefferson County is About the same as 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 Idaho, Jefferson County ranks 12 for per-capita risk, above the state's own per-capita average of 21.2 per 100,000 -- nationally, this rate leaves it more dangerous than most U.S. counties by that per-capita measure. The gap between Jefferson County's rate and the state average is 2.2 per 100,000. Its closest per-capita peer statewide is Valley County, at 23.7 per 100,000 (a difference of 0.3). Its peer counties, highest to lowest per 100,000 residents: Jerome County (70.6), Idaho County (44.7), Teton County (39.8), Elmore County (37.0), Payette County (33.0), Cassia County (31.1), Benewah County (28.9), Fremont County (28.2), Washington County (26.3), Gooding County (24.9), Valley County (23.7), Minidoka County (22.2), Blaine County (20.0), Gem County (19.0).
Jefferson County's rate vs. every rated U.S. county
Deaths per 100,000 residents -- counties with 10,000+ people, NHTSA FARS over Census population
23 Around the middle a lower per-capita rate than 28% 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 Jefferson County
Contextual links from this profile to rankings, tools, research, and peer geographies on PlainRoadSafety.
- Jefferson County vs other counties by ratePer-100k fatality comparison
- Idaho statewide fatality dataAll counties in this state
- Deadliest states for drivingContext for ID
- 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 JLetter index including ID counties
Frequently Asked Questions
How many traffic fatalities occurred in Jefferson County, Idaho?
Jefferson County recorded 30 total traffic fatalities across 28 reported crashes over the data period (2016-2023). The most recent year saw 8 fatalities. The county averages approximately 3.3 fatalities per year.
What is the leading cause of road fatalities in Jefferson County?
Cause-code breakdowns are not individually published for Jefferson County in the current FARS release. Statewide data for Idaho may provide additional context.
Is the trend of road fatalities in Jefferson County increasing or decreasing?
The trend in Jefferson 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 Jefferson County?
Jefferson County has a fatality rate of 23.4 per 100,000 residents, which leaves it more dangerous than most U.S. counties by that per-capita measure among the 3,137 U.S. counties in this dataset.
Where does Jefferson County rank for road fatality rate?
According to the National Highway Traffic Safety Administration Fatality Analysis Reporting System, Jefferson County ranks #660 of 2,328 U.S. counties by road-fatality rate per 100,000 residents (highest first) and #12 of 30 rated counties in ID, the same sort used on the deadliest-states and county rate listings. See /methodology#corpus-placement.
How does Jefferson County compare to the rest of Idaho?
Jefferson County's per-capita rate of 23.4 per 100,000 residents is above the Idaho county average of 21.2. Visit the Idaho state page for the full county-by-county breakdown.
Where does the road fatality data for Jefferson 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.