Fatal crashes in Cassia County, Idaho
In 2024, 12 people died in 11 fatal crashes in Cassia County, Idaho, up from 8 in 2023. From 2015 to 2024 the county recorded 62 fatal crashes and 71 deaths, the 13th most of 44 counties in Idaho.
46.2 deaths per 100,000 residents, against 11.9 across Idaho in 2024; 28.9 against 13.1 a year over 2015 to 2024. Population 25,976, Census Bureau estimate. All fatal crashes in Idaho.
Deaths in Cassia County by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 11 | 12 |
| 2023 | 7 | 8 |
| 2022 | 8 | 8 |
| 2021 | 7 | 9 |
| 2020 | 2 | 3 |
| 2019 | 5 | 5 |
| 2018 | 1 | 1 |
| 2017 | 4 | 5 |
| 2016 | 11 | 13 |
| 2015 | 6 | 7 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
The deadliest roads in Cassia County
I-84 had the most fatal crashes of any numbered road in Cassia County from 2015 to 2024: 10, with 11 deaths. The 4 roads listed held 52% of all fatal crashes in Cassia County from 2015 to 2024; 2 are interstates, 1 US route, 1 state highway. 60% of the county's fatal crashes were on an interstate, US or state route; the other 40% were on county roads and city streets. Routes are listed from 5 fatal crashes.
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
When fatal crashes happen in Cassia County
62 fatal crashes in Cassia County, Idaho from 2015 to 2024 have a known time, too few for any one weekday and time of day to stand out. The worst hour is 6 pm to 7 pm; the worst month is February.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 3.2 percent, 2 fatal crashes | 3.2 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 3.2 percent, 2 fatal crashes | 3.2 percent, 2 fatal crashes | 3.2 percent, 2 fatal crashes |
| Mon | 1.6 percent, 1 fatal crash | 3.2 percent, 2 fatal crashes | 3.2 percent, 2 fatal crashes | 4.8 percent, 3 fatal crashes | 1.6 percent, 1 fatal crash | 1.6 percent, 1 fatal crash |
| Tue | 1.6 percent, 1 fatal crash | 4.8 percent, 3 fatal crashes | 3.2 percent, 2 fatal crashes | 4.8 percent, 3 fatal crashes | 3.2 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes |
| Wed | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 3.2 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 4.8 percent, 3 fatal crashes | 1.6 percent, 1 fatal crash |
| Thu | 3.2 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 1.6 percent, 1 fatal crash | 3.2 percent, 2 fatal crashes | 1.6 percent, 1 fatal crash | 0.0 percent, 0 fatal crashes |
| Fri | 1.6 percent, 1 fatal crash | 1.6 percent, 1 fatal crash | 1.6 percent, 1 fatal crash | 1.6 percent, 1 fatal crash | 8.1 percent, 5 fatal crashes | 1.6 percent, 1 fatal crash |
| Sat | 0.0 percent, 0 fatal crashes | 3.2 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 3.2 percent, 2 fatal crashes | 4.8 percent, 3 fatal crashes | 3.2 percent, 2 fatal crashes |
By hour
By month
- Jan6.5%
- Feb12.9%
- Mar4.8%
- Apr8.1%
- May4.8%
- Jun8.1%
- Jul9.7%
- Aug9.7%
- Sep11.3%
- Oct12.9%
- Nov8.1%
- Dec3.2%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes in Cassia County first hit
The first harmful event was a collision with another vehicle in 37%; a rollover in 34%, a fixed object such as a tree, pole or barrier in 19%, a pedestrian in 3.2%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Collision with another vehicle | 23 | 37% |
| Rollover | 21 | 34% |
| Fixed object (tree, pole, barrier, ditch) | 12 | 19% |
| Other | 4 | 6.5% |
| Pedestrian | 2 | 3.2% |
| Cyclist | 0 | 0.0% |
| Parked vehicle | 0 | 0.0% |
| Not reported | 0 | 0.0% |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
How fatal crashes in Cassia County compare with Idaho
The largest difference from Idaho: from 2015 to 2024, 37% of fatal crashes in Cassia County were with a driver recorded as distracted, against 15% across Idaho. Below the Idaho share: motorcycles. Shares of fatal crashes from 2015 to 2024, against the share across all of Idaho. A share is only given over 20 crashes; above or below means more than chance would give on 62 crashes.
| Cassia | Idaho | ||
|---|---|---|---|
| On rural roads | 85% | 75% | about the same as the Idaho share |
| At or near an intersection | 21% | 21% | about the same as the Idaho share |
| In the dark, road unlit | 37% | 27% | about the same as the Idaho share |
| A drinking driver | 37% | 31% | about the same as the Idaho share |
| Speeding | 21% | 22% | about the same as the Idaho share |
| A distracted driver (as recorded) | 37% | 15% | above the Idaho share |
| Occupants killed unbelted | 62% | 58% | about the same as the Idaho share |
| Hit-and-run | 3.2% | 1.7% | about the same as the Idaho share |
| A motorcycle involved | 3.2% | 14% | below the Idaho share |
| Pedestrians among the dead | 2.8% | 6.9% | about the same as the Idaho share |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Questions about fatal crashes in Cassia County, Idaho
- How many people died in car accidents in Cassia County in 2024?
- 12 people died in 11 fatal crashes in Cassia County, Idaho, in 2024, up from 8 in 2023. That is 46.2 deaths per 100,000 residents, against 11.9 across Idaho. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- What is the deadliest road in Cassia County?
- I-84 had the most fatal crashes of any numbered road in Cassia County from 2015 to 2024: 10, with 11 deaths.
- How many fatal crashes in Cassia County involved a drinking driver?
- 23 of 62 fatal crashes in Cassia County from 2015 to 2024 involved a driver NHTSA recorded as drinking, 37%, against 31% across Idaho.
Other counties in Idaho with a page
- Ada County
- Canyon County
- Kootenai County
- Bonneville County
- Twin Falls County
- Jerome County
- Bingham County
- Bannock County
- Elmore County
- Bonner County
- Nez Perce County
- Idaho County
All fatal crashes in Idaho, with every county ranked.
Where the Cassia County numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash NHTSA filed in Cassia County (county code 31). A fatal crash is one in which someone died within 30 days. The rate per 100,000 uses the Census Bureau's population estimate for the county; it is the only figure here not counted from FARS. Totals from state highway departments and news reports can differ: they count from their own crash reports, often before every death within 30 days is known, while NHTSA's file is checked against death certificates and revised once a year. The full method.
Download every county with a page as CSV. Free to reuse with credit: “Fatal Crash Data, fatalcrashdata.com/fatal-crashes/idaho/cassia-county/, from NHTSA FARS (2024 Annual Report File).”