| Transit agency | City | Vehicles operated directly | Website |
|---|---|---|---|
| King County | Seattle | 1,849 | Official site |
| Snohomish County Public Transportation Benefit Area Corporation | Everett | 448 | Official site |
| Pierce County Transportation Benefit Area Authority | Lakewood | 341 | Official site |
| Central Puget Sound Regional Transit Authority | Seattle | 296 | Official site |
| Spokane Transit Authority | Spokane | 278 | Official site |
| Ben Franklin Transit | Richland | 255 | Official site |
| Intercity Transit | Olympia | 243 | Official site |
| Kitsap County Public Transportation Benefit Area Authority | Bremerton | 211 | Official site |
| Clark County Public Transportation Benefit Area Authority | Vancouver | 167 | Official site |
| Whatcom Transportation Authority | Bellingham | 103 | Official site |
| Chelan Douglas PTBA | Wenatchee | 81 | Official site |
| Skagit Transit | Burlington | 79 | Official site |
| Island Transit | Coupeville | 57 | Official site |
| Clallam Transit System | Port Angeles | 56 | Official site |
| City of Everett | Everett | 50 | Official site |
| Grays Harbor Transit | Hoquiam | 46 | Official site |
| Mason County Transportation Authority | Shelton | 35 | Official site |
| Grant County Transportation Authority | Moses Lake | 28 | Official site |
| Lewis County Transit | Centralia | 20 | Official site |
| Valley Transit | Walla Walla | 19 | Official site |
| City of Yakima | Yakima | 18 | Official site |
| City of Pullman | Pullman | 17 | Official site |
| Okanogan County Transit Authority | Okanogan | 16 | Official site |
| Washington State Ferries | Olympia | 15 | Official site |
| Klickitat County Senior Services | Goldendale | 14 | Official site |
| Pacific Transit | Raymond | 14 | Official site |
| Asotin County Public Transportation Benefit Area | Clarkston | 13 | Official site |
| Columbia County Public Transportation | Dayton | 13 | Official site |
| Jefferson Transit | Port Townsend | 13 | Official site |
| City of Longview | Longview | 12 | Official site |
| Skamania County Senior Services | Stevenson | 12 | Official site |
| Spokane Tribe of Indians | Wellpinit | 10 | Official site |
| Cowlitz Indian Tribe | Longview | 8 | Official site |
| Confederated Tribes and Bands of The Yakama Nation | Toppenish | 7 | Official site |
| Muckleshoot Indian Tribe | Auburn | 7 | Official site |
| Wahkiakum County | Cathlamet | 7 | Official site |
| Confederated Tribes of the Colville Indian Reservation | Nespelem | 5 | Official site |
| Squaxin Island Tribe | Shelton | 5 | Official site |
| Stillaguamish Tribe of Indians | Arlington | 5 | Official site |
| Garfield County Transportation Program | Pomeroy | 4 | Official site |
| Lummi Nation | Bellingham | 4 | Official site |
| Snoqualmie Indian Tribe | Snoqualmie | 2 | Official site |
| Lower Elwha Klallam Tribe | Port Angeles | 1 | Official site |
| Makah Tribal Council | Neah Bay | 1 | Official site |
| City of Seattle | Seattle | 0 | Official site |
| County of Pierce | Tacoma | 0 | Official site |
| Thurston Regional Planning Council | Olympia | 0 | Official site |
Largest first by vehicles operated directly, as each employer reports it to its federal registry.
Source: Federal Transit Administration, National Transit Database 2024 — Reporter Agency Information. Data captured September 30, 2026.