Environment nonprofits in Maryland

Environment nonprofits in Maryland. Browse 696 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

  1. 1000 Friends of Maryland

    EIN 521864759 · Headquarters: BALTIMORE, MD, USA · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990

  2. 29Th Division Association Inc

    EIN 521638964 · Headquarters: Cambridge, MD, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  3. 350 Montgomery County Inc

    EIN 475331447 · Headquarters: Kensington, MD, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  4. 4P Perryman Peninsula Preservation Project Inc

    EIN 934933062 · Headquarters: Aberdeen, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Adaptation Leader Inc

    EIN 880724470 · Headquarters: Bethesda, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Adkins Arboretum Ltd

    EIN 521163405 · Headquarters: RIDGELY, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Advocates for Herring Bay

    EIN 260364384 · Headquarters: Tracys Landing, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Africa Environmental Watch & Services Inc

    EIN 421644525 · Headquarters: Bowie, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. African Islands Business Council

    EIN 332341602 · Headquarters: Laurel, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Aguayuda Inc

    EIN 371532884 · Headquarters: EASTON, MD, USA · Environment · Latest available filing year: 2015 · Primary form: IRS Form 990

  11. Algonquin Ultras Inc

    EIN 821761778 · Headquarters: FRUITLAND, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  12. Alice Ferguson Foundation Inc

    EIN 520694646 · Headquarters: Accokeek, MD, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  13. Allegheny Highlands Conservancy Inc

    EIN 141927653 · Headquarters: Mchenry, MD, US · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  14. Alliance for Maryland Conservation Inc

    EIN 993883585 · Headquarters: upper marlboro, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Alliance to Restore Northwest Creek

    EIN 261304896 · Headquarters: Stevensville, MD, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  16. American Center for Life Cycle Assessment Corporation

    EIN 471733460 · Headquarters: Bethesda, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. American Chestnut Land Trust Inc

    EIN 521489614 · Headquarters: PRINCE FREDERICK, MD, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990

  18. American Clean Skies Foundation Inc

    EIN 208837141 · Headquarters: CHEVY CHASE, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  19. American Lumber Standard Committee Incorporated

    EIN 521951446 · Headquarters: FREDERICK, MD, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  20. American Rose Society

    EIN 581783824 · Headquarters: Hampstead, MD, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  21. Americans for the Conservation of Barroso Portugal Inc

    EIN 921527534 · Headquarters: Annapolis, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Ames Shalom Community Inc

    EIN 522224538 · Headquarters: Baltimore, MD, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  23. Amplify The Future Inc

    EIN 871887302 · Headquarters: Frederick, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Anacostia Watershed Society Inc

    EIN 521666511 · Headquarters: BLADENSBURG, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Anchor Point Inc

    EIN 262090520 · Headquarters: CAMBRIDGE, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. Annapolis Green Inc

    EIN 810985107 · Headquarters: Annapolis, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  27. Annapolis Horticultural Society

    EIN 522036951 · Headquarters: Annapolis, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Annapolis Neck Conservation Foundation Inc

    EIN 202665953 · Headquarters: Annapolis, MD, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  29. Anne Arundel County Alliance for Fair Land Use Inc

    EIN 202680579 · Headquarters: Annapolis, MD, US · Environment · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  30. Anne Arundel County Watershed Stewards Academy Inc

    EIN 273502329 · Headquarters: Millersville, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Anns Backyard Forest Ltd

    EIN 352481383 · Headquarters: Bethesda, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Antietam-conococheague Watershed Alliance Inc

    EIN 261827255 · Headquarters: Hagerstown, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Aqua Kids Tv Inc

    EIN 812457208 · Headquarters: Baltimore, MD, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  34. Artistree

    EIN 842326899 · Headquarters: Frederick, MD, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  35. Arundel Rivers Federation Inc

    EIN 522301464 · Headquarters: EDGEWATER, MD, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  36. Asian American Environmental Awareness Organization Inc

    EIN 522174050 · Headquarters: Clarksville, MD, US · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  37. Asks Inc

    EIN 800413553 · Headquarters: Shady Side, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Assateague Coastal Trust

    EIN 521250849 · Headquarters: Berlin, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. Assateague Island Alliance Inc

    EIN 261594926 · Headquarters: BERLIN, MD, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  40. Association for Environmental Studies and Sciences

    EIN 274841089 · Headquarters: Halethorpe, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  41. Association for Nature-based Education Inc

    EIN 814291262 · Headquarters: GLEN ARM, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. Audubon Society of Central Maryland

    EIN 521432995 · Headquarters: Mount Airy, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. B-baltimore Green

    EIN 465433837 · Headquarters: Baltimore, MD, US · Environment · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  44. Back River Foundation Inc

    EIN 843093646 · Headquarters: ESSEX, MD, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  45. Back River Restoration Committee In

    EIN 262595058 · Headquarters: BALTIMORE, MD, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  46. Baltimore County Land Trust Coalition Inc

    EIN 993552139 · Headquarters: HUNT VALLEY, MD, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  47. Baltimore Green Map

    EIN 274605649 · Headquarters: Baltimore, MD, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  48. Baltimore Green Space

    EIN 260530374 · Headquarters: Baltimore, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Baltimore Harbor Watershed Association Inc

    EIN 020725681 · Headquarters: Baltimore, MD, US · Environment · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  50. Baltimore Herb Festival Inc

    EIN 522089578 · Headquarters: Gwynn Oak, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Baltimore Reforestation Project Inc

    EIN 862247812 · Headquarters: BALTIMORE, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Baltimore Tree Trust Inc

    EIN 264031411 · Headquarters: BALTIMORE, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Bana Kasende Foundation

    EIN 863779236 · Headquarters: Frederick, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Bay Hundred Foundation Inc

    EIN 010675957 · Headquarters: St Michaels, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Bay Journal Media Inc

    EIN 262359058 · Headquarters: MAYO, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. Bay Land Trust Inc

    EIN 521608970 · Headquarters: Annapolis, MD, US · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  57. Bay Paddle Inc

    EIN 851598922 · Headquarters: ARNOLD, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  58. Beach Project

    EIN 993964978 · Headquarters: PARKVILLE, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  59. Bear Branch Sanctuary Inc

    EIN 412926849 · Headquarters: BRYANS RD, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Beaver Creek Watershed Association Inc

    EIN 043701511 · Headquarters: Funkstown, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Beltsville Garden Club Inc

    EIN 822164886 · Headquarters: Beltsville, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Belvedere Community Association Inc

    EIN 200348568 · Headquarters: ARNOLD, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Belvieu Food Village

    EIN 831046854 · Headquarters: Baltimore, MD, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  64. Ben Morrison Chapter Azalea Society of America

    EIN 820687664 · Headquarters: Silver Spring, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Berkshire-eastwood Recreation and Parks Council

    EIN 521869925 · Headquarters: BALTIMORE, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Bethesda Green Inc

    EIN 261825747 · Headquarters: BETHESDA, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. Betty Huse Md Charitable Foundation

    EIN 522307494 · Headquarters: BALTIMORE, MD, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  68. Beyond Coral Foundation Corp

    EIN 834232094 · Headquarters: Rockville, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Bird River Restoration Campaign

    EIN 472762161 · Headquarters: Middle River, MD, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  70. Black Hole Creek Environmentalconservancy Inc

    EIN 205602077 · Headquarters: Towson, MD, USA · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  71. Black Swamp Creek Land Tr

    EIN 200187366 · Headquarters: Brandywine, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Blackwater Conservation Association Inc

    EIN 931362196 · Headquarters: Edgewater, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Blue Moon Rising Center for Sustainable Education Inc

    EIN 460637049 · Headquarters: McHenry, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Blue Water Baltimore

    EIN 521420138 · Headquarters: BALTIMORE, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. Blunt Marsh Conservation Project Inc

    EIN 472031636 · Headquarters: Stevensville, MD, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  76. Bowleys Quarters Community Association Incorporated

    EIN 272822933 · Headquarters: Middle River, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Braddock Run Watershed Association

    EIN 412271279 · Headquarters: LaVale, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Broadwater Creek Coalition Inc

    EIN 202722606 · Headquarters: Churchton, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Brook South Fultons Camp Creek Cons Ervation Club Inc

    EIN 394990815 · Headquarters: Towson, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Brooklandville Station

    EIN 393818940 · Headquarters: Lutherville, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Bucktail Rod & Gun Club of Arnold I Nc

    EIN 394588016 · Headquarters: Arnold, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Buildingaction

    EIN 844692699 · Headquarters: Potomac, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. C&o Canal Trust Inc

    EIN 300401642 · Headquarters: Williamsport, MD, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990

  84. Calico Fields Environmental Education Inc

    EIN 833738565 · Headquarters: MILLINGTON, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Calvert Environmental Trust for Youth

    EIN 521974885 · Headquarters: PRINCE FREDERICK, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Calvert Nature Society Inc

    EIN 521473580 · Headquarters: Port Republic, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. Cape Conservation Corps

    EIN 473745740 · Headquarters: Annapolis, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. Cape St Claire Garden Club

    EIN 813217549 · Headquarters: Annapolis, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Carroll County Land Trust Inc

    EIN 521753235 · Headquarters: Westminster, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Carrollton Manor Land Trust Inc

    EIN 522248153 · Headquarters: Adamstown, MD, US · Environment · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  91. Catoctin Area Mountain Parks Environmental Resources Inc

    EIN 521285316 · Headquarters: Frederick, MD, US · Environment · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  92. Catoctin Forest Alliance Inc

    EIN 264223157 · Headquarters: Thurmont, MD, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Catoctin Land Trust Inc

    EIN 010578410 · Headquarters: FREDERICK, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Catonsville Rails to Trail Inc

    EIN 522178775 · Headquarters: Catonsville, MD, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  95. Cecil Land Trust Inc

    EIN 522111036 · Headquarters: ELKTON, MD, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  96. Cecil Land Use Association Inc

    EIN 463860003 · Headquarters: Elkton, MD, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  97. Cedar Haven Civic Association on the Patuxent River Inc

    EIN 450481539 · Headquarters: Aquasco, MD, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  98. Center for Aquatic Life and Conservation Inc

    EIN 202158507 · Headquarters: BALTIMORE, MD, USA · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990

  99. Center For Ecological Living & Learning

    EIN 030401313 · Headquarters: Derwood, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Center for Ecosystem Recovery Corp

    EIN 883215279 · Headquarters: MILLERSVILLE, MD, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

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