Cause IQ nonprofit insights

Top Environmental Organizations by Employees

Beach cleanup. Photo by Brian Yurasits.

The environmental organizations that employ the most people have between 137 and 4,099 employees, and tend to run environmental education, energy conservation, or natural resource conservation programs (among other types of environmental organizations). The more popular environmental organizations — Nature Conservancy, Greenpeace, Sierra Club, etc. — are present, but the realm of environmental nonprofits is much larger than just environmental advocacy. And geographically these top environmental organizations are distributed throughout the country, with states like Minnesota, Colorado, and Montana having a disproportionate presence.

Trends among the top environmental organizations

List of the top environmental organizations

  1. Nature Conservancy

    Employees:
    4,099
    Revenue:
    $1,184,630,698
    NTEE:
    EIN:
    53-0242652
    Location:
    Website:
    Founded:
    1951
    Employment trends:
  2. Student Conservation Association

    Employees:
    3,538
    Revenue:
    $41,970,851
    NTEE:
    EIN:
    91-0880684
    Location:
    Website:
    Founded:
    1964
    Employment trends:
  3. Wildlife Conservation Society

    Employees:
    2,826
    Revenue:
    $278,649,802
    NTEE:
    EIN:
    13-1740011
    Location:
    Website:
    Founded:
    1895
    Employment trends:
  4. Conservation Legacy

    Employees:
    1,874
    Revenue:
    $25,613,898
    NTEE:
    EIN:
    84-1450808
    Location:
    Website:
    Founded:
    1998
    Employment trends:
  5. American Conservation Experience

    Employees:
    1,621
    Revenue:
    $20,275,082
    NTEE:
    EIN:
    37-1473291
    Location:
    Website:
    Founded:
    2004
    Employment trends:
  6. Greenpeace

    Employees:
    1,338
    Revenue:
    $36,046,339
    NTEE:
    EIN:
    52-1541501
    Location:
    Website:
    Founded:
    1987
    Employment trends:
  7. Oak Ridge Associated Universities

    Employees:
    1,336
    Revenue:
    $92,887,150
    NTEE:
    EIN:
    62-0476816
    Location:
    Website:
    Founded:
    1946
    Employment trends:
  8. Coastal Villages Region Fund

    Employees:
    1,312
    Revenue:
    $60,962,503
    NTEE:
    EIN:
    92-0156736
    Location:
    Website:
    Founded:
    1992
    Employment trends:
  9. Massachusetts Audubon Society

    Employees:
    1,220
    Revenue:
    $48,480,848
    NTEE:
    EIN:
    04-2104702
    Location:
    Website:
    Founded:
    1896
    Employment trends:
  10. National Outdoor Leadership School

    Employees:
    1,129
    Revenue:
    $41,740,977
    NTEE:
    EIN:
    83-0204184
    Location:
    Website:
    Founded:
    1965
    Employment trends:
  11. National Audubon Society

    Employees:
    1,045
    Revenue:
    $133,521,772
    NTEE:
    EIN:
    13-1624102
    Location:
    Website:
    Founded:
    1905
    Employment trends:
  12. Sierra Club

    Employees:
    961
    Revenue:
    $143,677,959
    NTEE:
    EIN:
    94-1153307
    Location:
    Website:
    Founded:
    1892
    Employment trends:
  13. New York Public Interest Research Group Fund

    Employees:
    920
    Revenue:
    $4,492,628
    NTEE:
    EIN:
    13-2876109
    Location:
    Website:
    Founded:
    1976
    Employment trends:
  14. Los Angeles Conservation Corps

    Employees:
    901
    Revenue:
    $20,551,185
    NTEE:
    EIN:
    95-4002138
    Location:
    Website:
    Founded:
    1985
    Employment trends:
  15. The Trustees of Reservations

    Employees:
    824
    Revenue:
    $36,538,148
    NTEE:
    EIN:
    04-2105780
    Location:
    Website:
    Founded:
    1891
    Employment trends:
  16. Environmental Defense Fund

    Employees:
    816
    Revenue:
    $210,596,240
    NTEE:
    EIN:
    11-6107128
    Location:
    Website:
    Founded:
    1967
    Employment trends:
  17. Appalachian Mountain Club

    Employees:
    767
    Revenue:
    $43,806,285
    NTEE:
    EIN:
    04-6001677
    Location:
    Website:
    Founded:
    1876
    Employment trends:
  18. Natural Resources Defense Council

    Employees:
    702
    Revenue:
    $182,319,651
    NTEE:
    EIN:
    13-2654926
    Location:
    Website:
    Founded:
    1970
    Employment trends:
  19. Great Basin Institute

    Employees:
    686
    Revenue:
    $8,033,907
    NTEE:
    EIN:
    88-0431016
    Location:
    Website:
    Founded:
    1999
    Employment trends:
  20. Ducks Unlimited

    Employees:
    642
    Revenue:
    $192,778,583
    NTEE:
    EIN:
    13-5643799
    Location:
    Website:
    Founded:
    1937
    Employment trends:
  21. Conservation Corps MN & IA

    Employees:
    625
    Revenue:
    $9,221,708
    NTEE:
    EIN:
    41-1881102
    Location:
    Website:
    Founded:
    1999
    Employment trends:
  22. World Wildlife Fund

    Employees:
    615
    Revenue:
    $256,825,626
    NTEE:
    EIN:
    52-1693387
    Location:
    Website:
    Founded:
    1960
    Employment trends:
  23. Wurstfest

    Employees:
    610
    Revenue:
    $2,782,773
    NTEE:
    EIN:
    74-1590351
    Location:
    Website:
    Founded:
    1964
    Employment trends:
  24. National Geographic Society

    Employees:
    601
    Revenue:
    $130,737,807
    NTEE:
    EIN:
    53-0193519
    Location:
    Website:
    Founded:
    1888
    Employment trends:
  25. National Arbor Foundation

    Employees:
    528
    Revenue:
    $58,040,055
    NTEE:
    EIN:
    23-7169265
    Location:
    Website:
    Founded:
    1971
    Employment trends:
  26. World Resources Institute

    Employees:
    493
    Revenue:
    $140,234,162
    NTEE:
    EIN:
    52-1257057
    Location:
    Website:
    Founded:
    1982
    Employment trends:
  27. World Agroforestry Centre

    Employees:
    490
    Revenue:
    $55,187,000
    NTEE:
    EIN:
    31-1567778
    Location:
    Kenya
    Website:
    Founded:
    1978
    Employment trends:
  28. Center for American Progress

    Employees:
    488
    Revenue:
    $44,365,126
    NTEE:
    EIN:
    30-0126510
    Location:
    Website:
    Founded:
    2002
    Employment trends:
  29. Golden Gate National Parks Conservancy

    Employees:
    474
    Revenue:
    $72,959,901
    NTEE:
    EIN:
    94-2781708
    Location:
    Website:
    Founded:
    1981
    Employment trends:
  30. Conservation International

    Employees:
    454
    Revenue:
    $145,013,840
    NTEE:
    EIN:
    52-1497470
    Location:
    Website:
    Founded:
    1987
    Employment trends:
  31. Montana Conservation Corps

    Employees:
    444
    Revenue:
    $7,438,355
    NTEE:
    EIN:
    81-0467431
    Location:
    Website:
    Founded:
    1990
    Employment trends:
  32. The Trust for Public Land

    Employees:
    444
    Revenue:
    $137,307,989
    NTEE:
    EIN:
    23-7222333
    Location:
    Website:
    Founded:
    1972
    Employment trends:
  33. Pheasants Forever Incorporated

    Employees:
    396
    Revenue:
    $76,082,998
    NTEE:
    EIN:
    41-1429149
    Location:
    Website:
    Founded:
    1982
    Employment trends:
  34. National Wildlife Federation

    Employees:
    389
    Revenue:
    $83,853,035
    NTEE:
    EIN:
    53-0204616
    Location:
    Website:
    Founded:
    1939
    Employment trends:
  35. Vermont Energy Investment Corporation

    Employees:
    373
    Revenue:
    $95,648,100
    NTEE:
    EIN:
    03-0304418
    Location:
    Website:
    Founded:
    1986
    Employment trends:
  36. Grownyc

    Employees:
    351
    Revenue:
    $16,144,338
    NTEE:
    EIN:
    13-2765465
    Location:
    Website:
    Founded:
    1970
    Employment trends:
  37. Tree Trust

    Employees:
    341
    Revenue:
    $4,633,984
    NTEE:
    EIN:
    41-1291626
    Location:
    Website:
    Founded:
    1976
    Employment trends:
  38. Rocky Mountain Youth Corps

    Employees:
    338
    Revenue:
    $2,980,749
    NTEE:
    EIN:
    84-1483022
    Location:
    Website:
    Founded:
    1999
    Employment trends:
  39. Semcac

    Employees:
    327
    Revenue:
    $12,911,334
    NTEE:
    EIN:
    41-0907135
    Location:
    Website:
    Founded:
    1966
    Employment trends:
  40. Kupu

    Employees:
    324
    Revenue:
    $8,459,241
    NTEE:
    EIN:
    51-0652665
    Location:
    Website:
    Founded:
    2007
    Employment trends:
  41. Trout Unlimited

    Employees:
    323
    Revenue:
    $53,649,485
    NTEE:
    EIN:
    38-1612715
    Location:
    Website:
    Founded:
    1959
    Employment trends:
  42. National Wild Turkey Federation

    Employees:
    323
    Revenue:
    $40,089,940
    NTEE:
    EIN:
    57-0564993
    Location:
    Website:
    Founded:
    1973
    Employment trends:
  43. NatureBridge

    Employees:
    310
    Revenue:
    $21,334,330
    NTEE:
    EIN:
    94-2145930
    Location:
    Website:
    Founded:
    1971
    Employment trends:
  44. Nature's Classroom

    Employees:
    298
    Revenue:
    $8,222,619
    NTEE:
    EIN:
    04-2621656
    Location:
    Website:
    Founded:
    1977
    Employment trends:
  45. New Hampshire Lakes Association

    Employees:
    287
    Revenue:
    $1,466,560
    NTEE:
    EIN:
    22-2668396
    Location:
    Website:
    Founded:
    1992
    Employment trends:
  46. Western Pennsylvania Conservancy

    Employees:
    286
    Revenue:
    $27,453,433
    NTEE:
    EIN:
    25-1053485
    Location:
    Website:
    Founded:
    1932
    Employment trends:
  47. Grid Alternatives Affiliates and Subsidiaries

    Employees:
    285
    Revenue:
    $36,785,947
    NTEE:
    EIN:
    81-4042787
    Location:
    Website:
    Founded:
    2013
    Employment trends:
  48. Colorado Outdoor Education Center

    Employees:
    281
    Revenue:
    $6,408,763
    NTEE:
    EIN:
    84-0619264
    Location:
    Website:
    Founded:
    1972
    Employment trends:
  49. North Carolina Outward Bound School

    Employees:
    280
    Revenue:
    $10,592,998
    NTEE:
    EIN:
    56-0857708
    Location:
    Website:
    Founded:
    1966
    Employment trends:
  50. Chesapeake Bay Foundation

    Employees:
    269
    Revenue:
    $35,240,656
    NTEE:
    EIN:
    52-6065757
    Location:
    Website:
    Founded:
    1966
    Employment trends:
  51. Strategic Energy Innovations

    Employees:
    265
    Revenue:
    $4,283,767
    NTEE:
    EIN:
    68-0404081
    Location:
    Website:
    Founded:
    1997
    Employment trends:
  52. Social and Environmental Entrepreneurs

    Employees:
    262
    Revenue:
    $16,033,073
    NTEE:
    EIN:
    95-4116679
    Location:
    Website:
    Founded:
    1994
    Employment trends:
  53. The Wilds

    Employees:
    257
    Revenue:
    $7,342,058
    NTEE:
    EIN:
    31-1113570
    Location:
    Website:
    Founded:
    1984
    Employment trends:
  54. Teton Science Schools

    Employees:
    252
    Revenue:
    $14,292,836
    NTEE:
    EIN:
    83-0219163
    Location:
    Website:
    Founded:
    1974
    Employment trends:
  55. Earth Island Institute

    Employees:
    252
    Revenue:
    $14,352,706
    NTEE:
    EIN:
    94-2889684
    Location:
    Website:
    Founded:
    1982
    Employment trends:
  56. Incarnation Center

    Employees:
    247
    Revenue:
    $4,041,211
    NTEE:
    EIN:
    13-5657791
    Location:
    Website:
    Founded:
    1886
    Employment trends:
  57. IslandWood

    Employees:
    240
    Revenue:
    $9,733,721
    NTEE:
    EIN:
    31-1654076
    Location:
    Website:
    Founded:
    1999
    Employment trends:
  58. Chewonki Foundation

    Employees:
    240
    Revenue:
    $9,306,888
    NTEE:
    EIN:
    01-0269460
    Location:
    Website:
    Founded:
    1917
    Employment trends:
  59. Rising Sun Center for Opportunity

    Employees:
    233
    Revenue:
    $4,179,110
    NTEE:
    EIN:
    77-0359133
    Location:
    Website:
    Founded:
    1993
    Employment trends:
  60. U S Green Building Council

    Employees:
    223
    Revenue:
    $39,068,009
    NTEE:
    EIN:
    52-1822816
    Location:
    Website:
    Founded:
    1993
    Employment trends:
  61. National Ability Center

    Employees:
    219
    Revenue:
    $9,121,798
    NTEE:
    EIN:
    94-3025807
    Location:
    Website:
    Founded:
    1986
    Employment trends:
  62. Grid Alternatives

    Employees:
    217
    Revenue:
    $16,841,873
    NTEE:
    EIN:
    26-0043353
    Location:
    Website:
    Founded:
    2002
    Employment trends:
  63. Clinch-Powell Resource Conservation and Development Council

    Employees:
    213
    Revenue:
    $2,416,281
    NTEE:
    EIN:
    62-1396815
    Location:
    Website:
    Founded:
    1990
    Employment trends:
  64. Southern California Mountains Foundation

    Employees:
    211
    Revenue:
    $4,312,857
    NTEE:
    EIN:
    33-0556414
    Location:
    Website:
    Founded:
    1992
    Employment trends:
  65. The Conservation Fund

    Employees:
    204
    Revenue:
    $235,347,905
    NTEE:
    EIN:
    52-1388917
    Location:
    Website:
    Founded:
    1985
    Employment trends:
  66. Southern Environmental Law Center

    Employees:
    197
    Revenue:
    $60,076,970
    NTEE:
    EIN:
    52-1436778
    Location:
    Website:
    Founded:
    1985
    Employment trends:
  67. National Parks Conservation Association

    Employees:
    194
    Revenue:
    $42,004,321
    NTEE:
    EIN:
    53-0225165
    Location:
    Website:
    Founded:
    1919
    Employment trends:
  68. Yellowstone Forever

    Employees:
    194
    Revenue:
    $15,865,453
    NTEE:
    EIN:
    47-5427975
    Location:
    Website:
    Founded:
    2015
    Employment trends:
  69. Oceana

    Employees:
    193
    Revenue:
    $51,896,477
    NTEE:
    EIN:
    51-0401308
    Location:
    Website:
    Founded:
    2001
    Employment trends:
  70. Cradle of Forestry in America Interpretive Association

    Employees:
    192
    Revenue:
    $2,936,411
    NTEE:
    EIN:
    56-1302500
    Location:
    Website:
    Founded:
    1972
    Employment trends:
  71. Wilderness Inquiry

    Employees:
    190
    Revenue:
    $4,380,071
    NTEE:
    EIN:
    93-0708637
    Location:
    Website:
    Founded:
    1978
    Employment trends:
  72. Center for Sustainable Energy

    Employees:
    186
    Revenue:
    $179,688,938
    NTEE:
    EIN:
    33-0936366
    Location:
    Website:
    Founded:
    2000
    Employment trends:
  73. National Whitetail Deer Education Foundation

    Employees:
    183
    Revenue:
    $2,291,381
    NTEE:
    EIN:
    34-1821699
    Location:
    Website:
    Founded:
    1996
    Employment trends:
  74. Delaware Nature Society

    Employees:
    181
    Revenue:
    $3,123,199
    NTEE:
    EIN:
    51-6018321
    Location:
    Website:
    Founded:
    1964
    Employment trends:
  75. Joy Outdoor Education Center Foundation

    Employees:
    173
    Revenue:
    $5,565,929
    NTEE:
    EIN:
    31-0672822
    Location:
    Website:
    Founded:
    1937
    Employment trends:
  76. Wilderness Society

    Employees:
    172
    Revenue:
    $42,837,683
    NTEE:
    EIN:
    53-0167933
    Location:
    Website:
    Founded:
    1937
    Employment trends:
  77. Voyageur Outward Bound School

    Employees:
    168
    Revenue:
    $5,363,004
    NTEE:
    EIN:
    41-0877459
    Location:
    Website:
    Founded:
    1963
    Employment trends:
  78. International Fund for Animal Welfare

    Employees:
    163
    Revenue:
    $26,755,749
    NTEE:
    EIN:
    31-1594197
    Location:
    Website:
    Founded:
    1998
    Employment trends:
  79. Hurricane Island Outward Bound School

    Employees:
    161
    Revenue:
    $4,304,421
    NTEE:
    EIN:
    04-6089174
    Location:
    Website:
    Founded:
    1964
    Employment trends:
  80. Chattahoochee Nature Center

    Employees:
    159
    Revenue:
    $3,453,979
    NTEE:
    EIN:
    58-1275604
    Location:
    Website:
    Founded:
    1976
    Employment trends:
  81. Central Indiana Corporate Partnership

    Employees:
    154
    Revenue:
    $7,511,483
    NTEE:
    EIN:
    35-2065459
    Location:
    Website:
    Founded:
    1998
    Employment trends:
  82. Grand Canyon Association

    Employees:
    153
    Revenue:
    $11,073,536
    NTEE:
    EIN:
    86-0179548
    Location:
    Website:
    Founded:
    1932
    Employment trends:
  83. Keep Indianapolis Beautiful

    Employees:
    150
    Revenue:
    $4,965,699
    NTEE:
    EIN:
    31-1005792
    Location:
    Website:
    Founded:
    1980
    Employment trends:
  84. The Greening of Detroit

    Employees:
    147
    Revenue:
    $2,131,772
    NTEE:
    EIN:
    31-0036036
    Location:
    Website:
    Founded:
    1989
    Employment trends:
  85. Energy Federation

    Employees:
    147
    Revenue:
    $23,053,787
    NTEE:
    EIN:
    04-2790398
    Location:
    Website:
    Founded:
    1982
    Employment trends:
  86. Eagle's Nest Foundation

    Employees:
    146
    Revenue:
    $2,560,637
    NTEE:
    EIN:
    56-6009912
    Location:
    Website:
    Founded:
    1948
    Employment trends:
  87. Wildlife Safari

    Employees:
    144
    Revenue:
    $4,682,382
    NTEE:
    EIN:
    93-0772232
    Location:
    Website:
    Founded:
    1980
    Employment trends:
  88. Ceres

    Employees:
    144
    Revenue:
    $20,312,659
    NTEE:
    EIN:
    22-3053747
    Location:
    Website:
    Founded:
    1990
    Employment trends:
  89. Dauphin Island Sea Lab

    Employees:
    143
    Revenue:
    $15,301,502
    NTEE:
    EIN:
    63-0779657
    Location:
    Website:
    Founded:
    1971
    Employment trends:
  90. Rainforest Alliance

    Employees:
    143
    Revenue:
    $44,858,328
    NTEE:
    EIN:
    13-3377893
    Location:
    Website:
    Founded:
    1987
    Employment trends:
  91. Audubon Naturalist Society

    Employees:
    142
    Revenue:
    $5,564,742
    NTEE:
    EIN:
    53-0233715
    Location:
    Website:
    Founded:
    1947
    Employment trends:
  92. Defenders of Wildlife

    Employees:
    141
    Revenue:
    $39,116,128
    NTEE:
    EIN:
    53-0183181
    Location:
    Website:
    Founded:
    1947
    Employment trends:
  93. Dollar Energy Fund

    Employees:
    141
    Revenue:
    $33,833,046
    NTEE:
    EIN:
    25-1442933
    Location:
    Website:
    Founded:
    1983
    Employment trends:
  94. Great Lakes Indian Fish and Wildlife Commission

    Employees:
    139
    Revenue:
    $9,457,679
    NTEE:
    EIN:
    39-1468447
    Location:
    Website:
    Founded:
    1985
    Employment trends:
  95. Vermont Public Interest Research Group

    Employees:
    139
    Revenue:
    $1,485,862
    NTEE:
    EIN:
    03-0228267
    Location:
    Website:
    Founded:
    1972
    Employment trends:
  96. Howell Nature Center

    Employees:
    138
    Revenue:
    $3,197,915
    NTEE:
    EIN:
    47-4324628
    Location:
    Website:
    Founded:
    2016
    Employment trends:
  97. Center for Energy and Environment

    Employees:
    137
    Revenue:
    $15,342,976
    NTEE:
    EIN:
    41-1647799
    Location:
    Website:
    Founded:
    1989
    Employment trends:
  98. Trust for Hidden Villa

    Employees:
    137
    Revenue:
    $4,939,380
    NTEE:
    EIN:
    94-1539836
    Location:
    Website:
    Founded:
    1960
    Employment trends:
  99. Elevate Energy

    Employees:
    137
    Revenue:
    $24,828,806
    NTEE:
    EIN:
    36-4443093
    Location:
    Website:
    Founded:
    2001
    Employment trends:
  100. The Keystone Science School

    Employees:
    137
    Revenue:
    $5,040,027
    NTEE:
    EIN:
    46-1735364
    Location:
    Website:
    Founded:
    2013
    Employment trends:

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