Environment nonprofits in Washington
Environment nonprofits in Washington. Browse 1,169 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.
Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.
Nonprofit profiles
- Skagit River Alliance
EIN 834626138 · Headquarters: MARBLEMOUNT, WA, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- Skagit River Salmon Festival
EIN 455490813 · Headquarters: Mount Vernon, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Skagit Valley Clean Energy Alliance
EIN 990983551 · Headquarters: LaConner, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Skagit Watershed Council
EIN 911931237 · Headquarters: MOUNT VERNON, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Skagit-whatcom-island Trail Maintenance Organization Switmo
EIN 453688799 · Headquarters: Sedro Woolley, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Skansie Netshed Foundation
EIN 473879490 · Headquarters: Gig Harbor, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sky River Restoration
EIN 931694460 · Headquarters: Sultan, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Skyline Garden Club
EIN 352421107 · Headquarters: Anacortes, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Skyriver Foundation
EIN 933929455 · Headquarters: KIRKLAND, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Smart Buildings Center
EIN 811970869 · Headquarters: Seattle, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Snake Lake Nature Center Foundation
EIN 911121223 · Headquarters: Tacoma, WA, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- Sno-king Environmental Alliance
EIN 161631652 · Headquarters: Woodinville, WA, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- Sno-king Environmental Protection Coalition Sepc
EIN 812954208 · Headquarters: Shoreline, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Sno-king Watershed Council
EIN 800764419 · Headquarters: Kenmore, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Snohomish Garden Club
EIN 753035740 · Headquarters: Snohomish, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Snoisle Civic - Environmental Learning and Works Pc
EIN 462868707 · Headquarters: Everett, WA, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- Snoqualmie Fire Lookouts Association
EIN 853972284 · Headquarters: Enumclaw, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Snoqualmie Valley Garden Club
EIN 270046315 · Headquarters: NORTH BEND, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Snoqualmie Valley Unicycle Club
EIN 460869545 · Headquarters: North Bend, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Soap Lake Conservancy
EIN 912028084 · Headquarters: Soap Lake, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Soapbox Project
EIN 993419911 · Headquarters: SEATTLE, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Social and Technical Environmentally Appropriate
EIN 943186652 · Headquarters: BELLINGHAM, WA, US · Environment · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- Social Plastic Recycling Foundation
EIN 825124485 · Headquarters: Seattle, WA, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- Society for Plant Signaling and Behavior
EIN 223952634 · Headquarters: SEATTLE, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sofantic
EIN 883049334 · Headquarters: Port Orchard, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Solar Pie
EIN 270826135 · Headquarters: Seattle, WA, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Solar Washington
EIN 912083819 · Headquarters: Seattle, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Solutions for Humanity Community & the Environment
EIN 204014921 · Headquarters: Tacoma, WA, USA · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-EZ
- Soos Creek Area Response Scar
EIN 274055689 · Headquarters: Covington, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Sound Action
EIN 911945388 · Headquarters: Vashon, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Sound Biosphere
EIN 832284253 · Headquarters: Blaine, WA, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- Sound Data Science
EIN 923770555 · Headquarters: SEATTLE, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Sound Defense Alliance
EIN 831746975 · Headquarters: Coupeville, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Sound Water Stewards of Island County
EIN 810781793 · Headquarters: FREELAND, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- South Puget Environmental Education Clearinghouse
EIN 911549876 · Headquarters: Olympia, WA, US · Environment · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- South Sound Bird Alliance
EIN 911491678 · Headquarters: OLYMPIA, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- South Sound Estuary Association
EIN 392076160 · Headquarters: Olympia, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- South Sound Freedom Fences
EIN 474733082 · Headquarters: Tacoma, WA, US · Environment · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- South Whidbey Garden Club
EIN 814154204 · Headquarters: Clinton, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Southwest Washington Community Land Trust
EIN 311651303 · Headquarters: Vancouver, WA, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- Southwest Washington Gold Prospectors
EIN 383899902 · Headquarters: VANCOUVER, WA, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- Southwest Washington Section of Pncwa
EIN 841833822 · Headquarters: LACEY, WA, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- Spark Northwest
EIN 912141987 · Headquarters: Seattle, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Spectacle Lake Association
EIN 471091316 · Headquarters: Tonasket, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sphere One
EIN 852212051 · Headquarters: SEATTLE, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Splash International
EIN 562600599 · Headquarters: Seattle, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Spokane Mountaineers
EIN 916055859 · Headquarters: SPOKANE, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Spokane Mountaineers Foundation
EIN 262277535 · Headquarters: Spokane, WA, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- Spokane Ponderosa
EIN 884208567 · Headquarters: Spokane, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF
- Spokane River Forum
EIN 611566039 · Headquarters: Spokane, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Spokane Riverkeeper
EIN 845175870 · Headquarters: SPOKANE, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Spokane Zero Waste
EIN 922861440 · Headquarters: Spokane, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Sportsmens National Land Tr Washington Chapter
EIN 202527679 · Headquarters: Tumwater, WA, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- Spring to the Tap
EIN 463428805 · Headquarters: Enumclaw, WA, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- Squalicum Harbor Business Association
EIN 943183234 · Headquarters: Bellingham, WA, US · Environment · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- Srrttf Administrative and Contracting Entity
EIN 462333721 · Headquarters: Spokane, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Stand.earth
EIN 943331587 · Headquarters: Bellingham, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Standing for Nature
EIN 923367467 · Headquarters: Anderson Island, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Stewards of the Land and Community
EIN 510607518 · Headquarters: Snohomish, WA, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- Stewards of Wasington State Lands
EIN 394967403 · Headquarters: Issaquah, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Stewardship Partners
EIN 911939506 · Headquarters: Seattle, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Stillaguamish Citizens Alliance
EIN 911650450 · Headquarters: Granite falls, WA, US · Environment · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- Stillwaters Environmental Education Center
EIN 911959247 · Headquarters: Kingston, WA, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- Streissguth Gardens Conservancy
EIN 853194131 · Headquarters: Seattle, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Stufftvorg
EIN 921464851 · Headquarters: BELLEVUE, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Stuntz Mycology Fund
EIN 820823889 · Headquarters: SEATTLE, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sultan Garden Club
EIN 911201478 · Headquarters: Sultan, WA, US · Environment · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- Summit to Sea Conservation
EIN 202158316 · Headquarters: Camano Island, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Suquamish Environmental Education
EIN 061794587 · Headquarters: Suquamish, WA, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- Suquamish Garden Club
EIN 760773274 · Headquarters: Suquamish, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sustainability Foundation
EIN 204945821 · Headquarters: Kirkland, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sustainable Ballard
EIN 371835615 · Headquarters: SEATTLE, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Sustainable Ballard Association
EIN 202323433 · Headquarters: Seattle, WA, US · Environment · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- Sustainable Connections
EIN 753041952 · Headquarters: BELLINGHAM, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Sustainable Development Fund
EIN 862293279 · Headquarters: Camas, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sustainable Energy & Environmental Network
EIN 264281101 · Headquarters: PASCO, WA, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- Sustainable Fisheries Foundation
EIN 911689421 · Headquarters: Walla Walla, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sustainable NCW
EIN 823346592 · Headquarters: Wenatchee, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Sustainable Renton
EIN 451777828 · Headquarters: RENTON, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Sustainable Resources Inw
EIN 261608697 · Headquarters: Spokane Valley, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sustainable Seattle
EIN 311580932 · Headquarters: SEATTLE, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Sustainable Solutions Foundation
EIN 911817420 · Headquarters: SEQUIM, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Sustainable Style Foundation
EIN 550836808 · Headquarters: Mill Creek, WA, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- Sustainable Travel International
EIN 371461679 · Headquarters: SEATTLE, WA, USA · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990
- Sustainable West Seattle
EIN 262437518 · Headquarters: Seattle, WA, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- Swan Lake Watershed Preservation Group
EIN 364627404 · Headquarters: Oak Harbor, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Tacoma East Action Membership T E a M
EIN 270549666 · Headquarters: Tacoma, WA, US · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- Tacoma Garden Club
EIN 916032230 · Headquarters: University Place, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Tacoma Sportmens Club Conservation Land Trust
EIN 872881829 · Headquarters: Puyallup, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Tacoma Tree Foundation
EIN 832505388 · Headquarters: TACOMA, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Tacoma Urban Land Trust
EIN 223833548 · Headquarters: Tacoma, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Tahogreen Eco Guardians
EIN 331775791 · Headquarters: Maple Valley, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Tahoma Bird Alliance
EIN 237450873 · Headquarters: UNIVERSITY PL, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Tanan Enitadeg
EIN 823159079 · Headquarters: SEATTLE, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Tapteal Greenway
EIN 943234539 · Headquarters: Richland, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Target Earth International
EIN 770465706 · Headquarters: COLFAX, WA, USA · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ
- Tekoa Trail and Trestle Association
EIN 474120468 · Headquarters: Tekoa, WA, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- Temcov Foundation
EIN 943255515 · Headquarters: ANACORTES, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Templ
EIN 920296145 · Headquarters: Spokane, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Terra Commons
EIN 721525752 · Headquarters: Olympia, WA, US · Environment · Latest available filing year: 2009 · Primary form: IRS Form 990-N