Environment nonprofits

11,721 organizations, from IRS Form 990 filings and other public records.

Combined revenue $23.7B. Median revenue $186k — half of these organizations are smaller than that. Combined assets $68.5B.

Largest by revenue

Ranked on reported total revenue, not on any Helpfund score.

1. NEW VENTURE FUND — Washington, DC — $662.4M (FY2024)

2. THE CONSERVATION FUND A NONPROFIT — Arlington, VA — $373.2M (FY2024)

3. World Wildlife Fund — Washington, DC — $372.8M (FY2023)

4. CENTER FOR SUSTAINABLE ENERGY — San Diego, CA — $335.6M (FY2024)

5. WINDWARD FUND — Washington, DC — $308.2M (FY2024)

6. DUCKS UNLIMITED INC — Memphis, TN — $302.2M (FY2022)

7. ENVIRONMENTAL DEFENSE FUND INCORPORATED — New York, NY — $298.7M (FY2023)

8. THE TRUST FOR PUBLIC LAND — San Francisco, CA — $297.4M (FY2022)

9. SIXTEEN THIRTY FUND — Washington, DC — $282.2M (FY2024)

10. CLIMATE IMPERATIVE FOUNDATION — San Francisco, CA — $271.7M (FY2024)

11. CONSERVATION INTERNATIONAL FOUNDATION — Arlington, VA — $271.2M (FY2023)

12. ISO NEW ENGLAND INC — Holyoke, MA — $264.6M (FY2024)

13. ENERGY TRUST OF OREGON INC — Portland, OR — $251.2M (FY2024)

14. KLAMATH RIVER RENEWAL CORPORATION — Berkeley, CA — $195.5M (FY2023)

15. NATURAL RESOURCES DEFENSE COUNCIL INC — New York, NY — $193.1M (FY2022)

16. MARSHALL AREA ECONOMIC DEVELOPMENT — Marshall, MI — $151.6M (FY2022)

17. NATIONAL AUDUBON SOCIETY INC — New York, NY — $149.9M (FY2023)

18. Great Hearts America-Texas — San Antonio, TX — $137.4M (FY2023)

19. VERMONT ENERGY INVESTMENT CORPORATION — Winooski, VT — $130.9M (FY2024)

20. EARTHJUSTICE — San Francisco, CA — $126.0M (FY2022)

21. NATIONAL ARBOR DAY FOUNDATION — Lincoln, NE — $111.9M (FY2024)

22. THE NEW YORK CLIMATE EXCHANGE INC — New York, NY — $110.7M (FY2023)

23. NEW YORK BOTANICAL GARDEN — Bronx, NY — $110.4M (FY2023)

24. SIERRA CLUB FOUNDATION — Oakland, CA — $108.2M (FY2024)

25. CITY OF OAKS FOUNDATION INC — Raleigh, NC — $105.2M (FY2023)

26. SOCIAL & ENVIRONMENTAL ENTREPRENEURS — Calabasas, CA — $94.6M (FY2024)

27. THE URBAN LAND INSTITUTE — Washington, DC — $93.1M (FY2023)

28. PaintCare Inc — Washington, DC — $84.7M (FY2024)

29. RESOURCES LEGACY FUND — Sacramento, CA — $79.6M (FY2024)

30. CLIMATE POWER — Washington, DC — $79.4M (FY2024)

31. THE ATLANTA BOTANICAL GARDEN INC — Atlanta, GA — $76.0M (FY2024)

32. MISSOURI BOTANICAL GARDEN BOARD OF — St. Louis, MO — $75.3M (FY2023)

33. LEAGUE OF CONSERVATION VOTERS EDUCATION — Washington, DC — $75.2M (FY2024)

34. MASSACHUSETTS AUDUBON SOCIETY INC — Lincoln, MA — $73.7M (FY2023)

35. C40 CITIES CLIMATE LEADERSHIP GROUP INC — New York, NY — $73.6M (FY2024)

36. OPEN SPACE INSTITUTE LAND TRUST INC — New York, NY — $73.1M (FY2024)

37. ALLIANCE TO END PLASTIC WASTE INC — Austin, TX — $68.3M (FY2024)

38. CHICAGO HORTICULTURAL SOCIETY — Glencoe, IL — $68.1M (FY2024)

39. PALLADIUM FOUNDATION — Salt Lake City, UT — $66.9M (FY2024)

40. ALLIED CLIMATE PARTNERS INC — New York, NY — $66.5M (FY2024)

41. The Wildlands Conservancy — Oak Glen, CA — $66.0M (FY2023)

42. MULTIPLIER — San Francisco, CA — $65.8M (FY2024)

43. THE TRUSTEES OF RESERVATIONS — Boston, MA — $64.9M (FY2023)

44. HOLDFAST TRUST — Jackson, WY — $63.3M (FY2024)

45. NATIONAL WILD TURKEY FEDERATION INC — Edgefield, SC — $63.1M (FY2023)

46. THE SUNRISE PROJECT INC — Dover, DE — $61.1M (FY2024)

47. Elevate Energy — Chicago, IL — $60.9M (FY2024)

48. DUCKS UNLIMITED INC GROUP RETURN — Memphis, TN — $59.3M (FY2022)

49. THE MORTON ARBORETUM — Lisle, IL — $57.8M (FY2024)

50. SAVE THE REDWOODS LEAGUE — San Francisco, CA — $57.8M (FY2023)

51. Fondo Mexicano para la Conservacion de la Naturaleza AC — Mexico City — $57.1M (FY2024)

52. REDWOOD FOREST FOUNDATION INC — Fort Bragg, CA — $53.6M (FY2024)

53. BONNEVILLE ENVIRONMENTAL FOUNDATION — Portland, OR — $51.8M (FY2024)

54. GOLDEN GATE NATIONAL PARKS CONSERVANCY — San Francisco, CA — $50.7M (FY2023)

55. US GREEN BUILDING COUNCIL INC — Washington, DC — $50.3M (FY2024)

56. CLEAN AIR TASK FORCE INC — Boston, MA — $50.1M (FY2024)

57. Ocean Conservancy — Washington, DC — $49.2M (FY2023)

58. NATIONAL NETWORK OF ABORTION FUNDS INC — Beaverton, OR — $49.2M (FY2022)

59. SUSTAINABLE ENERGY UTILITY INC — Dover, DE — $48.7M (FY2024)

60. CENTER FOR INTERNATIONAL FORESTRY — Jawa Barat — $48.6M (FY2024)

61. CATALYST4 INC — Palo Alto, CA — $48.5M (FY2024)

62. SUSTAINABLE MARKETS FOUNDATION — New York, NY — $48.0M (FY2023)

63. LIVING DESERT THE — Palm Desert, CA — $48.0M (FY2024)

64. Southern Appalachian Highlands Conservancy Inc — Asheville, NC — $48.0M (FY2023)

65. Great Barrier Reef Foundation USA Inc — Washington, DC — $47.8M (FY2024)

66. GRID ALTERNATIVES — Oakland, CA — $46.9M (FY2024)

67. THANKSGIVING POINT INSTITUTE INC — Lehi, UT — $46.2M (FY2023)

68. GRID ALTERNATIVES AFFILIATES & — Oakland, CA — $46.0M (FY2024)

69. GREAT BASIN INSTITUTE — Reno, NV — $45.9M (FY2024)

70. INTERNATIONAL CENTRE FOR RESEARCH IN — Nairobi — $45.4M (FY2024)

71. AMERICAN PRAIRIE FOUNDATION — Bozeman, MT — $44.7M (FY2024)

72. American Conservation Experience — Flagstaff, AZ — $44.7M (FY2024)

73. Climate Arc Inc — Dover, DE — $44.4M (FY2024)

74. Appalachian Mountain Club — Boston, MA — $43.6M (FY2024)

75. NATIONAL OUTDOOR LEADERSHIP SCHOOL — Lander, WY — $43.0M (FY2023)

76. Forest Park Forever Inc — St. Louis, MO — $42.3M (FY2024)

77. THE WILDERNESS SOCIETY — Washington, DC — $42.0M (FY2023)

78. MATTRESS RECYCLING COUNCIL INC — Alexandria, VA — $41.8M (FY2024)

79. YELLOWSTONE FOREVER — Bozeman, MT — $41.8M (FY2024)

80. DENVER BOTANIC GARDENS INC — Denver, CO — $41.6M (FY2024)

81. THE RECYCLING PARTNERSHIP INC — Washington, DC — $41.2M (FY2024)

82. NORTHWEST ENERGY EFFICIENCY ALLIANCE — Portland, OR — $41.1M (FY2024)

83. SLIPSTREAM GROUP INC — Madison, WI — $41.1M (FY2024)

84. CERES INC — Boston, MA — $40.9M (FY2023)

85. NAPA COUNTY LAND TRUST — Napa, CA — $39.7M (FY2024)

86. PRODUCT CARE ASSOCIATION OF CANADA — Vancouver — $39.1M (FY2024)

87. BIG COUNTRY ELECTRIC COOPERATIVE INC — Roby, TX — $38.6M (FY2024)

88. CDP NORTH AMERICA INC — New York, NY — $38.4M (FY2023)

89. GLOBAL GREENGRANTS FUND — Boulder, CO — $38.1M (FY2023)

90. THE PENNSYLVANIA HORTICULTURAL SOCIETY — Philadelphia, PA — $37.8M (FY2022)

91. REWIRING AMERICA INC — Washington, DC — $37.6M (FY2024)

92. CLIMATE LEAD INC — San Francisco, CA — $37.5M (FY2024)

93. EARTHSHARE — Washington, DC — $37.3M (FY2024)

94. International Sustainable Energy Foundat — Austin, TX — $36.9M (FY2023)

95. AMERICAN RIVERS INC — Washington, DC — $36.6M (FY2023)

96. BROOKLYN BOTANIC GARDEN CORPORATION — Brooklyn, NY — $36.2M (FY2024)

97. NATIONAL MARINE SANCTUARY FOUNDATION — Silver Spring, MD — $36.0M (FY2024)

98. NATIONAL PARKS CONSERVATION ASSOCIATION — Washington, DC — $35.1M (FY2022)

99. Marine Stewardship Council — London — $35.1M (FY2024)

100. MICHAEL AND DEBORAH SCIARRINO FAMILY — Winter Park, FL — $34.9M (FY2024)

Who funds this sector

Drawn from each funder's own IRS filing, not reported by the organizations they fund.

NATIONAL FISH AND WILDLIFE FOUNDATION — 477 organizations funded, most recently 2023

THE NATURE CONSERVANCY — 332 organizations funded, most recently 2023

UNITED STATES ENERGY FOUNDATION — 315 organizations funded, most recently 2024

RESOURCES LEGACY FUND — 179 organizations funded, most recently 2024

LAND TRUST ALLIANCE INC — 155 organizations funded, most recently 2024

DAVIS CONSERVATION FOUNDATION — 88 organizations funded, most recently 2024

NATIONAL FOREST FOUNDATION — 87 organizations funded, most recently 2023

National Park Foundation — 85 organizations funded, most recently 2023

CLIMATEWORKS FOUNDATION — 83 organizations funded, most recently 2024

ENVIRONMENTAL DEFENSE FUND INCORPORATED — 82 organizations funded, most recently 2023

NATIONAL ARBOR DAY FOUNDATION — 76 organizations funded, most recently 2024

NATIONAL AUDUBON SOCIETY INC — 74 organizations funded, most recently 2023

CLIMATE IMPERATIVE FOUNDATION — 71 organizations funded, most recently 2024

CHESAPEAKE BAY TRUST — 67 organizations funded, most recently 2024

ENERGY ACTION FUND — 61 organizations funded, most recently 2024

NATURAL RESOURCES DEFENSE COUNCIL INC — 61 organizations funded, most recently 2022

NATIONAL WILDLIFE FEDERATION — 61 organizations funded, most recently 2023

Where individual donors give

Donor-advised funds and giving platforms that pass on gifts from individual donors. They fund across every sector and do not take proposals.

FIDELITY INVESTMENTS CHARITABLE GIFT FUND

SCHWAB CHARITABLE FUND

AMERICAN ONLINE GIVING FOUNDATION INC

Vanguard Charitable Endowment Program

NATIONAL PHILANTHROPIC TRUST

MORGAN STANLEY GLOBAL IMPACT FUNDING TRUST INC

AMERICAN ENDOWMENT FOUNDATION

TIDES FOUNDATION

GOLDMAN SACHS PHILANTHROPY FUND

Silicon Valley Community Foundation

Trends

We hold one year of filings per organization today, so we cannot yet show how this sector has changed over time. We would rather leave this out than chart something that only looks like a trend.

Source: IRS Form 990 filings and other public records, republished by Helpfund. Placement is never sold.