Environment nonprofits
Environment nonprofits. Browse 35,718 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
- ONeill Sea Odyssey
EIN 770464784 · Headquarters: Santa Cruz, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Oneonta Federated Garden Club
EIN 270994130 · Headquarters: Oneonta, NY, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Oneonta Southside and Sand Vally Civic Club
EIN 612246196 · Headquarters: Oneonta, AL, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Onepair Charity
EIN 882251665 · Headquarters: Peoria, AZ, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- OnePlanet USA Inc
EIN 474202052 · Headquarters: Burke, VA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Onesimo Land Conservancy
EIN 454534815 · Headquarters: Bodega Bay, CA, US · Environment · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- Onesquethaw Coeymans Watershed Council Inc
EIN 161596986 · Headquarters: Clarksville, NY, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- Onewild Inc
EIN 881779587 · Headquarters: PRINCEVILLE, HI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Onexeveryone
EIN 844240352 · Headquarters: fort collins, CO, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Onion Bag Litter Prevention Project
EIN 932034441 · Headquarters: MOUNT VERNON, OH, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Oniyabison Us
EIN 931838054 · Headquarters: LA JARA, CO, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Only One Inc
EIN 462746860 · Headquarters: NEW YORK, NY, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Only One Ocean Corp
EIN 990674835 · Headquarters: BURKE, VA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Onomilu
EIN 331678613 · Headquarters: KALAHEO, HI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Onondaga Audubon Society Inc
EIN 237037547 · Headquarters: Syracuse, NY, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Onondaga Earth Corps Inc
EIN 460593831 · Headquarters: SYRACUSE, NY, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Onondaga Environmental Institute Inc
EIN 161374219 · Headquarters: SYRACUSE, NY, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Onslow Bay Artificial Reef Association
EIN 043624560 · Headquarters: WILMINGTON, NC, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- Onslow County Master Gardener Volunteers
EIN 752975859 · Headquarters: Jacksonville, NC, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Ontario Bays Initiative Inc
EIN 161461521 · Headquarters: CHAUMONT, NY, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Onterra
EIN 994865886 · Headquarters: Washington, DC, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Ontos Foundation
EIN 301319452 · Headquarters: HAPPY VALLEY, OR, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Onyx Cultural and Educational Foundation Incorporated
EIN 331038227 · Headquarters: West Bloomfield, MI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Oo Project
EIN 843451269 · Headquarters: WASHINGTON, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Oopsie Daisy Garden Club
EIN 933829177 · Headquarters: DILLEY, TX, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opal Creek Ancient Forest Center
EIN 943112973 · Headquarters: Portland, OR, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Blue Inc
EIN 470982320 · Headquarters: Albuquerque, NM, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Climate Tech Inc
EIN 850825357 · Headquarters: Los Altos, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Flow Inc
EIN 472639630 · Headquarters: CENTENNIAL, CO, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF
- Open Garden Day
EIN 920433265 · Headquarters: Santa Ana, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open H20 Inc
EIN 462553792 · Headquarters: New York, NY, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- Open Land Conservancy of Chester County
EIN 237253755 · Headquarters: PAOLI, PA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Sea Foundation
EIN 330410680 · Headquarters: San Diego, CA, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- Open Source Ecology
EIN 454997514 · Headquarters: Maysville, MO, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Open Space Alliance
EIN 850442322 · Headquarters: Albuquerque, NM, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Space Alliance
EIN 860852792 · Headquarters: PRESCOTT, AZ, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- Open Space Alliance for North Brooklyn Inc
EIN 010849087 · Headquarters: BROOKLYN, NY, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Space Cafe Theatre
EIN 208038279 · Headquarters: BROWNS SUMMIT, NC, USA · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ
- Open Space Cncl for the St Louis Region
EIN 436065329 · Headquarters: SAINT LOUIS, MO, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Open Space Conservation Cooperative
EIN 475528650 · Headquarters: Freehold, NJ, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Open Space Council
EIN 113197246 · Headquarters: Brookhaven, NY, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Space Institute
EIN 133028060 · Headquarters: New York, NY, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Space Institute Inc
EIN 521053406 · Headquarters: NEW YORK, NY, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Space Land Preserve Foundation
EIN 202611306 · Headquarters: CALABASAS, CA, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-PF
- Open Space Legal Defense Fund Inc
EIN 273556299 · Headquarters: Whittier, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Space Management Inc
EIN 311646921 · Headquarters: IMPERIAL BEACH, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Open Space Preservation Society Inc
EIN 843564833 · Headquarters: San Francisco, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Open Space Productions Inc
EIN 273993258 · Headquarters: Brooklyn, NY, US · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- Open Space Protection Alliance
EIN 853701204 · Headquarters: Longmont, CO, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Space Sausalito
EIN 471670327 · Headquarters: SAUSALITO, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Open Space Trails Alliance
EIN 994480469 · Headquarters: Diablo, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Trails Nj Inc
EIN 810746948 · Headquarters: Medford, NJ, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Open Water Foundation
EIN 462676240 · Headquarters: FORT COLLINS, CO, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Waters Louisiana Inc
EIN 920408815 · Headquarters: METAIRIE, LA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- OpenAQ Inc
EIN 475324172 · Headquarters: Washington, DC, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Opened Window Inc
EIN 333251827 · Headquarters: TALLAHASSEE, FL, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Openet Inc
EIN 872247137 · Headquarters: LAS VEGAS, NV, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Openfarm Inc
EIN 472888335 · Headquarters: San Luis Obispo, CA, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- Openoceans Global
EIN 262476179 · Headquarters: SAN DIEGO, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Openvega Foundation
EIN 392823408 · Headquarters: Washington, DC, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opequon Creek Project Team
EIN 208662529 · Headquarters: Martinsburg, WV, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Operation 11Th Hour
EIN 874490396 · Headquarters: Independence, IA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Bluebonnet
EIN 760476479 · Headquarters: Houston, TX, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- Operation Brightside Inc
EIN 480909948 · Headquarters: Kansas City, KS, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- Operation Build Veterans Inc
EIN 872903255 · Headquarters: Kissimmee, FL, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Butterfly
EIN 923493935 · Headquarters: Harrold, SD, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Operation Clean Slate
EIN 330584810 · Headquarters: COSTA MESA, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Operation Eco Vets
EIN 831533905 · Headquarters: Cape Coral, FL, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Ezekiel Inc
EIN 934409818 · Headquarters: St Johns, FL, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Green Leaves Inc
EIN 650284655 · Headquarters: CORAL GABLES, FL, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- Operation Green Team Foundation
EIN 474459980 · Headquarters: HUNTSVILLE, AL, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Operation Monarch Inc
EIN 812100070 · Headquarters: PHILADELPHIA, PA, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- Operation P R I D E Inc
EIN 593711614 · Headquarters: Brooksville, FL, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Pride Inc
EIN 611238610 · Headquarters: BOWLING GREEN, KY, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operation Rivers Northwest Oregon
EIN 770629265 · Headquarters: Tillamook, OR, US · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- Operation Safe Drinking Water
EIN 263619782 · Headquarters: Camarillo, CA, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- Operation Save the Earth
EIN 461516759 · Headquarters: Phoenix, AZ, US · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- Operation Sealife Foundation
EIN 873403094 · Headquarters: Key West, FL, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- Operation Shade Tree
EIN 842985892 · Headquarters: Boston, MA, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- Operation Splash Inc
EIN 113186309 · Headquarters: FREEPORT, NY, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Operator Training Committee of Ohio Inc
EIN 316065198 · Headquarters: Springfield, OH, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Opes Oceani Foundation Inc
EIN 853160014 · Headquarters: ALEXANDRIA, VA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Opgc Inc
EIN 334856017 · Headquarters: TAMPA, FL, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Ophelia Garden Club
EIN 911285489 · Headquarters: University Place, WA, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- Ophir Canyon Water Association
EIN 870507236 · Headquarters: TOOELE, UT, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Opportunity Ministries Inc
EIN 454599833 · Headquarters: PASADENA, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- OPS Foundation
EIN 203570498 · Headquarters: Greenbrae, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Opsanus Fund
EIN 334065471 · Headquarters: Alexandria, VA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Optima Environmental Corporation
EIN 392474856 · Headquarters: Palm Bay, FL, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Optimistic Orchard
EIN 862806716 · Headquarters: Bainbridge Island, WA, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- Optimum Living Alliance
EIN 204471467 · Headquarters: Haiku, HI, US · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- Optimum World Charity Inc
EIN 331239345 · Headquarters: LAS VEGAS, NV, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Optometric Retina Society
EIN 200960735 · Headquarters: Miami, FL, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opulent Ecosystems
EIN 883605915 · Headquarters: Savannah, GA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opus Dei Corporation
EIN 922989184 · Headquarters: Apopka, FL, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Oracle Community Learning Garden Inc
EIN 882639109 · Headquarters: Oracle, AZ, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Oracle Conservancy Land Trust Inc
EIN 860958156 · Headquarters: Oracle, AZ, US · Environment · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- Orange Coast Watershed and Environmental Center
EIN 204377765 · Headquarters: Laguna Niguel, CA, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- Orange County Audubon Society Inc
EIN 237293099 · Headquarters: Warwick, NY, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Orange County Bonsai Society Inc
EIN 262874268 · Headquarters: Brea, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N