The deadliest roads in Washington
I-5 had the most fatal crashes of any numbered road in Washington from 2015 to 2024: 339, with 370 deaths. The 60 roads listed held 39% of all fatal crashes in Washington from 2015 to 2024; 6 are interstates, 6 US routes, 48 state highways.
179 numbered roads in Washington recorded a fatal crash in those years; the 60 with 5 or more are ranked below, and 13 have a page of their own. All fatal crashes in Washington.
Every numbered road in Washington, ranked by fatal crashes
| Road | Kind | Fatal crashes | Deaths | 2022 to 2024 | Counties with the most | |
|---|---|---|---|---|---|---|
| 1 | I-5 | Interstate | 339 | 370 | 108 | King, Pierce, Snohomish |
| 2 | I-90 | Interstate | 155 | 176 | 57 | Kittitas, King, Spokane |
| 3 | State Highway 99 | State highway | 137 | 147 | 58 | King, Snohomish, Pierce |
| 4 | US 2 | US route | 117 | 131 | 44 | Spokane, Snohomish, Chelan |
| 5 | US 101 | US route | 97 | 109 | 40 | Clallam, Mason, Jefferson |
| 6 | State Highway 20 | State highway | 84 | 89 | 25 | Skagit, Island, Okanogan |
| 7 | US 12 | US route | 83 | 93 | 28 | Lewis, Yakima, Walla Walla |
| 8 | State Highway 7 | State highway | 79 | 83 | 40 | Pierce, Lewis |
| 9 | US 97 | US route | 78 | 90 | 31 | Yakima, Okanogan, Chelan |
| 10 | US 395 | US route | 77 | 85 | 28 | Stevens, Franklin, Spokane |
| 11 | I-82 | Interstate | 73 | 82 | 18 | Yakima, Benton, Kittitas |
| 12 | State Highway 14 | State highway | 52 | 60 | 17 | Clark, Skamania, Klickitat |
| 13 | State Highway 167 | State highway | 41 | 42 | 12 | King, Pierce |
| 14 | State Highway 3 | State highway | 40 | 40 | 17 | Kitsap, Mason |
| 15 | State Highway 17 | State highway | 39 | 42 | 13 | Grant, Adams, Franklin |
| 16 | State Highway 9 | State highway | 37 | 42 | 13 | Snohomish, Skagit, Whatcom |
| 17 | State Highway 509 | State highway | 34 | 40 | 13 | Pierce, King |
| 18 | State Highway 18 | State highway | 34 | 36 | 12 | King |
| 19 | State Highway 28 | State highway | 31 | 32 | 9 | Grant, Douglas, Lincoln |
| 20 | State Highway 26 | State highway | 29 | 36 | 10 | Adams, Grant, Whitman |
| 21 | State Highway 503 | State highway | 29 | 35 | 11 | Clark, Cowlitz |
| 22 | I-405 | Interstate | 26 | 27 | 9 | King, Snohomish |
| 23 | State Highway 16 | State highway | 25 | 25 | 5 | Pierce, Kitsap |
| 24 | State Highway 516 | State highway | 23 | 27 | 12 | King |
| 25 | State Highway 161 | State highway | 22 | 23 | 11 | Pierce, King |
| 26 | State Highway 169 | State highway | 22 | 22 | 7 | King |
| 27 | State Highway 522 | State highway | 21 | 21 | 6 | King, Snohomish |
| 28 | I-182 | Interstate | 19 | 22 | 8 | Franklin, Benton |
| 29 | State Highway 27 | State highway | 19 | 21 | 9 | Spokane, Whitman |
| 30 | State Highway 530 | State highway | 19 | 19 | 6 | Snohomish, Skagit |
| 31 | State Highway 164 | State highway | 18 | 20 | 8 | King |
| 32 | US 195 | US route | 18 | 20 | 5 | Whitman, Spokane |
| 33 | I-205 | Interstate | 18 | 19 | 9 | Clark |
| 34 | State Highway 290 | State highway | 17 | 19 | 6 | Spokane |
| 35 | State Highway 500 | State highway | 17 | 19 | 7 | Clark |
| 36 | State Highway 525 | State highway | 17 | 18 | 7 | Island, Snohomish |
| 37 | State Highway 507 | State highway | 16 | 17 | 5 | Thurston, Pierce, Lewis |
| 38 | State Highway 512 | State highway | 15 | 21 | 5 | Pierce |
| 39 | State Highway 24 | State highway | 15 | 18 | 6 | Yakima, Adams, Benton |
| 40 | State Highway 510 | State highway | 15 | 17 | 7 | Thurston |
| 41 | State Highway 181 | State highway | 15 | 15 | 5 | King |
| 42 | State Highway 291 | State highway | 15 | 15 | 7 | Spokane, Stevens |
| 43 | State Highway 22 | State highway | 14 | 21 | 3 | Yakima, Benton |
| 44 | State Highway 104 | State highway | 14 | 16 | 5 | Jefferson, King, Kitsap |
| 45 | State Highway 155 | State highway | 14 | 16 | 2 | Okanogan, Grant |
| 46 | State Highway 240 | State highway | 14 | 15 | 11 | Benton |
| 47 | State Highway 410 | State highway | 13 | 15 | 3 | King, Pierce, Yakima |
| 48 | State Highway 900 | State highway | 13 | 14 | 4 | King |
| 49 | State Highway 243 | State highway | 12 | 13 | 4 | Grant |
| 50 | State Highway 4 | State highway | 12 | 13 | 5 | Cowlitz, Wahkiakum |
| 51 | State Highway 6 | State highway | 12 | 13 | 6 | Lewis, Pacific |
| 52 | State Highway 508 | State highway | 11 | 13 | 3 | Lewis |
| 53 | State Highway 527 | State highway | 11 | 11 | 5 | Snohomish |
| 54 | State Highway 529 | State highway | 11 | 11 | 2 | Snohomish |
| 55 | State Highway 203 | State highway | 10 | 10 | 5 | King, Snohomish |
| 56 | State Highway 515 | State highway | 10 | 10 | 2 | King |
| 57 | State Highway 8 | State highway | 10 | 10 | 4 | Grays Harbor, Thurston |
| 58 | State Highway 432 | State highway | 9 | 11 | 4 | Cowlitz |
| 59 | State Highway 11 | State highway | 9 | 10 | 2 | Skagit, Whatcom |
| 60 | State Highway 202 | State highway | 9 | 10 | 4 | King |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Download every numbered road in Washington as CSV. Free to reuse with credit: “Fatal Crash Data, fatalcrashdata.com/deadliest-roads/washington/, from NHTSA FARS (2024 Annual Report File).”
Interstates in Washington per mile
Fatal crashes a year per 100 miles of road, 2015 to 2024, for interstates with 20 miles or more in Washington. Crashes per mile of road, not per vehicle. Mileage from the FHWA Interstate route log.
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Questions about the deadliest roads in Washington
- What is the deadliest road in Washington?
- I-5 had the most fatal crashes of any numbered road in Washington from 2015 to 2024: 339, with 370 deaths. I-90 was second with 155 and State Highway 99 third with 137. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- Which interstate in Washington is the most dangerous per mile?
- I-5, with 12.3 fatal crashes a year per 100 miles over 2015 to 2024 on 277 miles. That is crashes per mile of road, not per vehicle.
- How many fatal crashes in Washington happen on numbered roads?
- 2,669 of 5,793 fatal crashes in Washington from 2015 to 2024 (46%) were filed on an interstate, US or state route; the rest were on county roads, city streets and unnamed roads, which are in the state's total but not ranked here.
Where the Washington road numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash filed on a numbered interstate, US or state route in Washington, read from the road name NHTSA filed, with ramps, frontage and service roads left out. A road gets its own page with 15 or more fatal crashes from 2022 to 2024. The full method.