What the Data Shows

Over the 2015-2023 reporting window, Idaho recorded 2,149 total road fatalities across 44 counties, with 275 deaths logged in 2023. The state's fatality rate stands at 14.0 per 100,000 residents and 1.4 per 100 million vehicle miles traveled, placing it at rank #20 of 51 US states when ordered from highest to lowest fatality rate. Against the national benchmark of 12.2 per 100K, Idaho is 14.7% above average — a gap that matters for insurers, policymakers, and drivers calibrating risk.

Cause breakdowns from NHTSA FARS show alcohol-impaired crashes accounting for 30.1% of Idaho's fatalities (647 deaths), speeding for 21.7% (466 deaths), and pedestrian incidents for 7.0% (151 deaths). The single largest contributing factor is unrestrained, involved in 1,051 of the state's road deaths. Because these categories overlap — a nighttime fatal crash may also involve alcohol and speeding — the percentages are not additive but do reveal where enforcement and infrastructure investment can most reduce future deaths.

The trend signal is equally important: Idaho's annual fatality count is increasing, changing +27.9% across the reporting period. Annual deaths moved from 216 in 2015 to 275 in 2023. Rural roads account for 1,605 deaths versus 530 on urban roads, a pattern that typically reflects longer emergency-response distances and higher travel speeds outside metro areas. Readers should treat this as descriptive data — not a ranking of driver quality — and always cross-reference the underlying FARS release for year-specific context.