COUNTY FATALITY DATA
Jefferson County: larger FARS fatality book
Jefferson County (CO) holds a larger FARS book (369, #140 of 3,137) with 47 latest-year deaths.
- 369
- Total Fatalities (2016-2023)
- 47
- Latest Year Deaths
- Very high count
- 8.2
- Per 100k Residents
- Well below average
- Increasing
- Trend
Larger fatality book
Jefferson County ranks #140 of 3,137 by total FARS fatalities (369 across 2016-2023) - top-third book size.
Jefferson County in the larger-book third
According to NHTSA FARS, Jefferson County carries a top-third fatality book (369 across 2016-2023, #140 of 3,137) at 8.2/100k.
- #1,946 of 2,328
- lower-rate third
- #140 of 3,137
- larger-book third
- #27 of 33
- in CO by rate
- Increasing
- fatality trend
Highway fatality milepost
Milepost JEFFERSON-59 · Jefferson 8.2/100k · #1,946 of 2,328
Jefferson County · 8.2/100k · increasing
- RANK 8.2/100k
- BOOK #1,946 of 2,328
- TREND 369 book
- CAUSE Increasing
- PHOTO near Contra Costa
- VS-ST -48.0% vs CO
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 → · Colorado state profile →
Jefferson County rate neighbourhood
Deaths per 100,000 residents vs nearest nationwide rate peers (pop ≥250k).
- Baltimore …
Baltimore (City) County
8 per 100k
- Jefferson
Jefferson County
8 per 100k
- Contra Costa
Contra Costa County
8 per 100k
- Union
Union County
8 per 100k
- Virginia B…
Virginia Beach (City) County
8 per 100k
What this shows Jefferson County sits among nearest nationwide per-capita peers.
How does Jefferson County compare?
2023 road deaths per 100,000 residents. Choose any comparison from the menu.
Jefferson County is 48% 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 Colorado, Jefferson County ranks 15 for per-capita risk, below the state's own per-capita average of 15.8 per 100,000 -- nationally, this rate leaves it safer than most U.S. counties by that per-capita measure. The gap between Jefferson County's rate and the state average is 7.6 per 100,000. Its closest per-capita peer statewide is Fremont County, at 13.9 per 100,000 (a difference of 5.7). Its peer counties, highest to lowest per 100,000 residents: Park County (38.6), Routt County (35.9), Archuleta County (35.2), Logan County (29.1), Rio Grande County (26.8, limited data), Montezuma County (26.4), Pueblo County (23.6), La Plata County (21.3), Morgan County (20.3), Delta County (18.9), Gunnison County (17.3, limited data), Summit County (16.4), Weld County (16.1), Fremont County (13.9).
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
8 Among the safer counties a lower per-capita rate than 83% 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
Counties with similar FARS profiles
Two cross-state peer sets for Jefferson 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 (8.2 here), outside Colorado.
Similar fatality volume
Nearest counties by recorded FARS deaths (369 here), excluding the rate-peer set.
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
- Colorado statewide fatality dataAll counties in this state
- Deadliest states for drivingContext for CO
- 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 CO counties
- CONTRA COSTA County, CA fatalitiesSimilar nationwide FARS profile
- UNION County, NC fatalitiesSimilar nationwide FARS profile
- VIRGINIA BEACH (CITY) County, VA fatalitiesSimilar nationwide FARS profile
- BALTIMORE (CITY) County, MD fatalitiesSimilar nationwide FARS profile
Frequently Asked Questions
How many traffic fatalities occurred in Jefferson County, Colorado?
Jefferson County recorded 369 total traffic fatalities across 348 reported crashes over the data period (2016-2023). The most recent year saw 47 fatalities. The county averages approximately 41.0 fatalities per year.
What is the leading cause of road fatalities in Jefferson County?
Despite a comparatively active crash history (348 recorded crashes), individual cause-code breakdowns are not published for Jefferson County in the current FARS release. Statewide data for Colorado 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 8.2 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.
Where does Jefferson County rank for road fatality rate?
According to the National Highway Traffic Safety Administration Fatality Analysis Reporting System, Jefferson County ranks #1,946 of 2,328 U.S. counties by road-fatality rate per 100,000 residents (highest first) and #27 of 33 rated counties in CO, 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 Colorado?
Jefferson County's per-capita rate of 8.2 per 100,000 residents is below the Colorado county average of 15.8. Visit the Colorado 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.