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 166 and 4,091 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. The Nature Conservancy

    Employees:
    4,091
    Revenue:
    $1,137,390,674
    NTEE:
    EIN:
    53-0242652
    Location:
    Website:
    Founded:
    1951
    Employment trends:
  2. Wildlife Conservation Society

    Employees:
    2,796
    Revenue:
    $255,583,692
    NTEE:
    EIN:
    13-1740011
    Location:
    Website:
    Founded:
    1895
    Employment trends:
  3. Student Conservation Association

    Employees:
    2,605
    Revenue:
    $37,357,144
    NTEE:
    EIN:
    91-0880684
    Location:
    Website:
    Founded:
    1964
    Employment trends:
  4. Alliance for Sustainable Energy

    Employees:
    2,365
    Revenue:
    $493,549,580
    NTEE:
    EIN:
    26-1939342
    Location:
    Website:
    Founded:
    2008
    Employment trends:
  5. Conservation Legacy

    Employees:
    2,043
    Revenue:
    $28,043,844
    NTEE:
    EIN:
    84-1450808
    Location:
    Website:
    Founded:
    1998
    Employment trends:
  6. American Conservation Experience

    Employees:
    1,621
    Revenue:
    $21,291,175
    NTEE:
    EIN:
    37-1473291
    Location:
    Website:
    Founded:
    2004
    Employment trends:
  7. Coastal Villages Region Fund

    Employees:
    1,357
    Revenue:
    $54,429,639
    NTEE:
    EIN:
    92-0156736
    Location:
    Website:
    Founded:
    1992
    Employment trends:
  8. Greenpeace

    Employees:
    1,291
    Revenue:
    $36,732,324
    NTEE:
    EIN:
    52-1541501
    Location:
    Website:
    Founded:
    1987
    Employment trends:
  9. Massachusetts Audubon Society

    Employees:
    1,285
    Revenue:
    $38,308,793
    NTEE:
    EIN:
    04-2104702
    Location:
    Website:
    Founded:
    1896
    Employment trends:
  10. National Audubon Society

    Employees:
    1,161
    Revenue:
    $157,358,989
    NTEE:
    EIN:
    13-1624102
    Location:
    Website:
    Founded:
    1905
    Employment trends:
  11. National Outdoor Leadership School

    Employees:
    1,138
    Revenue:
    $39,933,201
    NTEE:
    EIN:
    83-0204184
    Location:
    Website:
    Founded:
    1965
    Employment trends:
  12. Sierra Club

    Employees:
    1,033
    Revenue:
    $156,717,329
    NTEE:
    EIN:
    94-1153307
    Location:
    Website:
    Founded:
    1892
    Employment trends:
  13. New York Public Interest Research Group Fund

    Employees:
    980
    Revenue:
    $2,769,371
    NTEE:
    EIN:
    13-2876109
    Location:
    Website:
    Founded:
    1976
    Employment trends:
  14. The Trustees of Reservations

    Employees:
    924
    Revenue:
    $44,778,213
    NTEE:
    EIN:
    04-2105780
    Location:
    Website:
    Founded:
    1891
    Employment trends:
  15. Natural Resources Defense Council

    Employees:
    868
    Revenue:
    $197,585,835
    NTEE:
    EIN:
    13-2654926
    Location:
    Website:
    Founded:
    1970
    Employment trends:
  16. Environmental Defense Fund

    Employees:
    860
    Revenue:
    $185,639,721
    NTEE:
    EIN:
    11-6107128
    Location:
    Website:
    Founded:
    1967
    Employment trends:
  17. Appalachian Mountain Club

    Employees:
    760
    Revenue:
    $35,424,938
    NTEE:
    EIN:
    04-6001677
    Location:
    Website:
    Founded:
    1876
    Employment trends:
  18. George Washington's Mount Vernon

    Employees:
    752
    Revenue:
    $66,250,790
    NTEE:
    EIN:
    54-0564701
    Location:
    Website:
    Founded:
    1853
    Employment trends:
  19. Great Basin Institute

    Employees:
    709
    Revenue:
    $16,509,588
    NTEE:
    EIN:
    88-0431016
    Location:
    Website:
    Founded:
    1999
    Employment trends:
  20. Wurstfest

    Employees:
    686
    Revenue:
    $5,278,851
    NTEE:
    EIN:
    74-1590351
    Location:
    Website:
    Founded:
    1964
    Employment trends:
  21. Ducks Unlimited

    Employees:
    678
    Revenue:
    $185,369,449
    NTEE:
    EIN:
    13-5643799
    Location:
    Website:
    Founded:
    1937
    Employment trends:
  22. World Wildlife Fund

    Employees:
    677
    Revenue:
    $286,350,088
    NTEE:
    EIN:
    52-1693387
    Location:
    Website:
    Founded:
    1960
    Employment trends:
  23. Battelle Ecology

    Employees:
    653
    Revenue:
    $2,726,950
    NTEE:
    EIN:
    20-4510571
    Location:
    Website:
    Founded:
    2005
    Employment trends:
  24. World Resources Institute

    Employees:
    622
    Revenue:
    $159,318,068
    NTEE:
    EIN:
    52-1257057
    Location:
    Website:
    Founded:
    1982
    Employment trends:
  25. Golden Gate National Parks Conservancy

    Employees:
    548
    Revenue:
    $67,544,820
    NTEE:
    EIN:
    94-2781708
    Location:
    Website:
    Founded:
    1981
    Employment trends:
  26. National Arbor Foundation

    Employees:
    516
    Revenue:
    $83,851,981
    NTEE:
    EIN:
    23-7169265
    Location:
    Website:
    Founded:
    1971
    Employment trends:
  27. National Geographic Society

    Employees:
    481
    Revenue:
    $70,469,785
    NTEE:
    EIN:
    53-0193519
    Location:
    Website:
    Founded:
    1888
    Employment trends:
  28. Montana Conservation Corps

    Employees:
    481
    Revenue:
    $7,859,830
    NTEE:
    EIN:
    81-0467431
    Location:
    Website:
    Founded:
    1990
    Employment trends:
  29. Conservation Corps MN & IA

    Employees:
    478
    Revenue:
    $8,353,381
    NTEE:
    EIN:
    41-1881102
    Location:
    Website:
    Founded:
    1999
    Employment trends:
  30. Pheasants Forever Incorporated

    Employees:
    475
    Revenue:
    $67,643,527
    NTEE:
    EIN:
    41-1429149
    Location:
    Website:
    Founded:
    1982
    Employment trends:
  31. Total Action for Progress

    Employees:
    432
    Revenue:
    $21,520,083
    NTEE:
    EIN:
    54-6057095
    Location:
    Website:
    Founded:
    1965
    Employment trends:
  32. Conservation International

    Employees:
    424
    Revenue:
    $159,498,081
    NTEE:
    EIN:
    52-1497470
    Location:
    Website:
    Founded:
    1987
    Employment trends:
  33. National Wildlife Federation

    Employees:
    397
    Revenue:
    $82,468,942
    NTEE:
    EIN:
    53-0204616
    Location:
    Website:
    Founded:
    1939
    Employment trends:
  34. The Trust for Public Land

    Employees:
    367
    Revenue:
    $141,296,610
    NTEE:
    EIN:
    23-7222333
    Location:
    Website:
    Founded:
    1972
    Employment trends:
  35. Rocky Mountain Youth Corps

    Employees:
    364
    Revenue:
    $3,155,399
    NTEE:
    EIN:
    84-1483022
    Location:
    Website:
    Founded:
    1999
    Employment trends:
  36. GrowNYC

    Employees:
    363
    Revenue:
    $19,747,202
    NTEE:
    EIN:
    13-2765465
    Location:
    Website:
    Founded:
    1970
    Employment trends:
  37. Lake Junaluska

    Employees:
    356
    Revenue:
    $12,926,692
    NTEE:
    EIN:
    56-0547461
    Location:
    Website:
    Founded:
    1938
    Employment trends:
  38. American Youth Foundation

    Employees:
    352
    Revenue:
    $6,817,175
    NTEE:
    EIN:
    43-0652614
    Location:
    Website:
    Founded:
    1925
    Employment trends:
  39. Semcac

    Employees:
    328
    Revenue:
    $14,638,878
    NTEE:
    EIN:
    41-0907135
    Location:
    Website:
    Founded:
    1966
    Employment trends:
  40. Calleva

    Employees:
    326
    Revenue:
    $5,678,163
    NTEE:
    EIN:
    52-2082054
    Location:
    Website:
    Founded:
    1999
    Employment trends:
  41. Trout Unlimited

    Employees:
    324
    Revenue:
    $60,391,561
    NTEE:
    EIN:
    38-1612715
    Location:
    Website:
    Founded:
    1959
    Employment trends:
  42. National Wild Turkey Federation

    Employees:
    324
    Revenue:
    $33,963,969
    NTEE:
    EIN:
    57-0564993
    Location:
    Website:
    Founded:
    1973
    Employment trends:
  43. Grid Alternatives Affiliates & Subsidiaries

    Employees:
    314
    Revenue:
    $32,765,734
    NTEE:
    EIN:
    81-4042787
    Location:
    Website:
    Founded:
    2013
    Employment trends:
  44. Vermont Energy Investment Corporation

    Employees:
    302
    Revenue:
    $99,018,110
    NTEE:
    EIN:
    03-0304418
    Location:
    Website:
    Founded:
    1986
    Employment trends:
  45. Kupu

    Employees:
    298
    Revenue:
    $9,582,228
    NTEE:
    EIN:
    51-0652665
    Location:
    Website:
    Founded:
    2007
    Employment trends:
  46. Chesapeake Bay Foundation

    Employees:
    298
    Revenue:
    $37,635,927
    NTEE:
    EIN:
    52-6065757
    Location:
    Website:
    Founded:
    1966
    Employment trends:
  47. Tree Trust

    Employees:
    296
    Revenue:
    $4,602,285
    NTEE:
    EIN:
    41-1291626
    Location:
    Website:
    Founded:
    1976
    Employment trends:
  48. NatureBridge

    Employees:
    295
    Revenue:
    $15,639,255
    NTEE:
    EIN:
    94-2145930
    Location:
    Website:
    Founded:
    1971
    Employment trends:
  49. Hale Reservation

    Employees:
    285
    Revenue:
    $4,880,612
    NTEE:
    EIN:
    04-2111550
    Location:
    Website:
    Founded:
    1930
    Employment trends:
  50. Citizens Campaign for the Environment

    Employees:
    284
    Revenue:
    $1,918,370
    NTEE:
    EIN:
    11-2717326
    Location:
    Website:
    Founded:
    1985
    Employment trends:
  51. NH Lakes

    Employees:
    277
    Revenue:
    $1,043,839
    NTEE:
    EIN:
    22-2668396
    Location:
    Website:
    Founded:
    1992
    Employment trends:
  52. Western Pennsylvania Conservancy

    Employees:
    277
    Revenue:
    $24,653,253
    NTEE:
    EIN:
    25-1053485
    Location:
    Website:
    Founded:
    1932
    Employment trends:
  53. Social and Environmental Entrepreneurs

    Employees:
    277
    Revenue:
    $21,261,930
    NTEE:
    EIN:
    95-4116679
    Location:
    Website:
    Founded:
    1994
    Employment trends:
  54. Nature's Classroom

    Employees:
    273
    Revenue:
    $4,692,206
    NTEE:
    EIN:
    04-2621656
    Location:
    Website:
    Founded:
    1977
    Employment trends:
  55. Georgia System Operations Corporation

    Employees:
    273
    Revenue:
    $81,836,312
    NTEE:
    EIN:
    58-2231207
    Location:
    Website:
    Founded:
    1997
    Employment trends:
  56. Colorado Outdoor Education Center

    Employees:
    272
    Revenue:
    $6,072,235
    NTEE:
    EIN:
    84-0619264
    Location:
    Website:
    Founded:
    1972
    Employment trends:
  57. Southern California Mountains Foundation

    Employees:
    264
    Revenue:
    $5,046,950
    NTEE:
    EIN:
    33-0556414
    Location:
    Website:
    Founded:
    1992
    Employment trends:
  58. North Carolina Outward Bound School

    Employees:
    262
    Revenue:
    $11,146,154
    NTEE:
    EIN:
    56-0857708
    Location:
    Website:
    Founded:
    1966
    Employment trends:
  59. Rocky Mountain Institute

    Employees:
    261
    Revenue:
    $61,864,266
    NTEE:
    EIN:
    74-2244146
    Location:
    Website:
    Founded:
    1982
    Employment trends:
  60. Embarras River Basin Agency

    Employees:
    258
    Revenue:
    $14,423,807
    NTEE:
    EIN:
    37-0890281
    Location:
    Website:
    Founded:
    1965
    Employment trends:
  61. Earth Island Institute

    Employees:
    252
    Revenue:
    $16,760,146
    NTEE:
    EIN:
    94-2889684
    Location:
    Website:
    Founded:
    1982
    Employment trends:
  62. Teton Science Schools

    Employees:
    251
    Revenue:
    $14,977,593
    NTEE:
    EIN:
    83-0219163
    Location:
    Website:
    Founded:
    1974
    Employment trends:
  63. IslandWood

    Employees:
    250
    Revenue:
    $6,123,638
    NTEE:
    EIN:
    31-1654076
    Location:
    Website:
    Founded:
    1999
    Employment trends:
  64. Vermont Youth Conservation Corps

    Employees:
    248
    Revenue:
    $3,314,425
    NTEE:
    EIN:
    03-0328834
    Location:
    Website:
    Founded:
    1991
    Employment trends:
  65. Incarnation Center

    Employees:
    247
    Revenue:
    $4,202,537
    NTEE:
    EIN:
    13-5657791
    Location:
    Website:
    Founded:
    1886
    Employment trends:
  66. Johnny Morris' Wonders of Wildlife Foundation

    Employees:
    244
    Revenue:
    $36,605,936
    NTEE:
    EIN:
    82-2342237
    Location:
    Website:
    Founded:
    2017
    Employment trends:
  67. Chewonki Foundation

    Employees:
    244
    Revenue:
    $11,564,632
    NTEE:
    EIN:
    01-0269460
    Location:
    Website:
    Founded:
    1917
    Employment trends:
  68. Center for Sustainable Energy

    Employees:
    241
    Revenue:
    $305,300,571
    NTEE:
    EIN:
    33-0936366
    Location:
    Website:
    Founded:
    2000
    Employment trends:
  69. The Wilds

    Employees:
    240
    Revenue:
    $6,652,124
    NTEE:
    EIN:
    31-1113570
    Location:
    Website:
    Founded:
    1984
    Employment trends:
  70. National Ability Center

    Employees:
    238
    Revenue:
    $9,922,088
    NTEE:
    EIN:
    94-3025807
    Location:
    Website:
    Founded:
    1986
    Employment trends:
  71. Daniel Boone Community Action Agency

    Employees:
    237
    Revenue:
    $12,685,227
    NTEE:
    EIN:
    61-0728039
    Location:
    Founded:
    1972
    Employment trends:
  72. Stark County Community Action Agency

    Employees:
    235
    Revenue:
    $11,991,503
    NTEE:
    EIN:
    34-1320658
    Location:
    Website:
    Founded:
    1980
    Employment trends:
  73. Voyageur Outward Bound School

    Employees:
    230
    Revenue:
    $8,339,690
    NTEE:
    EIN:
    41-0877459
    Location:
    Website:
    Founded:
    1963
    Employment trends:
  74. Puerto Rican Action Board

    Employees:
    221
    Revenue:
    $12,073,726
    NTEE:
    EIN:
    22-1944440
    Location:
    Website:
    Founded:
    1971
    Employment trends:
  75. The Conservation Fund

    Employees:
    220
    Revenue:
    $221,481,591
    NTEE:
    EIN:
    52-1388917
    Location:
    Website:
    Founded:
    1985
    Employment trends:
  76. Friends of the High Line

    Employees:
    210
    Revenue:
    $18,024,000
    NTEE:
    EIN:
    31-1734086
    Location:
    Website:
    Founded:
    2000
    Employment trends:
  77. Brandywine Conservancy & Museum of Art

    Employees:
    210
    Revenue:
    $6,815,716
    NTEE:
    EIN:
    51-6020908
    Location:
    Website:
    Founded:
    1967
    Employment trends:
  78. Southern Environmental Law Center

    Employees:
    206
    Revenue:
    $39,889,386
    NTEE:
    EIN:
    52-1436778
    Location:
    Website:
    Founded:
    1985
    Employment trends:
  79. Yellowstone Forever

    Employees:
    204
    Revenue:
    $14,346,181
    NTEE:
    EIN:
    47-5427975
    Location:
    Website:
    Founded:
    2015
    Employment trends:
  80. Rising Sun Center for Opportunity

    Employees:
    204
    Revenue:
    $4,431,956
    NTEE:
    EIN:
    77-0359133
    Location:
    Website:
    Founded:
    1993
    Employment trends:
  81. Alliance for a Green Revolution in Africa

    Employees:
    202
    Revenue:
    $95,918,592
    NTEE:
    EIN:
    98-0513530
    Location:
    Website:
    Founded:
    2007
    Employment trends:
  82. Clinch-Powell Resource Conservation and Development Council

    Employees:
    199
    Revenue:
    $2,413,931
    NTEE:
    EIN:
    62-1396815
    Location:
    Website:
    Founded:
    1990
    Employment trends:
  83. National Parks Conservation Association

    Employees:
    194
    Revenue:
    $40,067,349
    NTEE:
    EIN:
    53-0225165
    Location:
    Website:
    Founded:
    1919
    Employment trends:
  84. Nicholas Community Action Partnership

    Employees:
    192
    Revenue:
    $4,362,442
    NTEE:
    EIN:
    55-0485438
    Location:
    Website:
    Founded:
    1965
    Employment trends:
  85. Friends of the Forest Preserves

    Employees:
    192
    Revenue:
    $2,700,315
    NTEE:
    EIN:
    36-4519273
    Location:
    Website:
    Founded:
    1998
    Employment trends:
  86. Slipstream Group

    Employees:
    190
    Revenue:
    $48,356,747
    NTEE:
    EIN:
    39-1356152
    Location:
    Website:
    Founded:
    1980
    Employment trends:
  87. The New Haven Ecology Project

    Employees:
    187
    Revenue:
    $5,430,142
    NTEE:
    EIN:
    22-3171185
    Location:
    Website:
    Founded:
    1991
    Employment trends:
  88. Oceana

    Employees:
    186
    Revenue:
    $38,632,475
    NTEE:
    EIN:
    51-0401308
    Location:
    Website:
    Founded:
    2001
    Employment trends:
  89. Conservation Corps of Long Beach

    Employees:
    185
    Revenue:
    $5,829,792
    NTEE:
    EIN:
    33-0293393
    Location:
    Website:
    Founded:
    1987
    Employment trends:
  90. Strategic Energy Innovations

    Employees:
    185
    Revenue:
    $4,886,567
    NTEE:
    EIN:
    68-0404081
    Location:
    Website:
    Founded:
    1997
    Employment trends:
  91. U S Green Building Council

    Employees:
    185
    Revenue:
    $31,512,308
    NTEE:
    EIN:
    52-1822816
    Location:
    Website:
    Founded:
    1993
    Employment trends:
  92. National Whitetail Deer Education Foundation

    Employees:
    183
    Revenue:
    $2,291,381
    NTEE:
    EIN:
    34-1821699
    Location:
    Website:
    Founded:
    1996
    Employment trends:
  93. International Fund for Animal Welfare

    Employees:
    178
    Revenue:
    $31,281,740
    NTEE:
    EIN:
    31-1594197
    Location:
    Website:
    Founded:
    1998
    Employment trends:
  94. Camp Joy

    Employees:
    178
    Revenue:
    $4,331,041
    NTEE:
    EIN:
    31-0672822
    Location:
    Website:
    Founded:
    1937
    Employment trends:
  95. Delaware Nature Society

    Employees:
    178
    Revenue:
    $4,348,530
    NTEE:
    EIN:
    51-6018321
    Location:
    Website:
    Founded:
    1964
    Employment trends:
  96. Center for Energy and Environment

    Employees:
    177
    Revenue:
    $15,847,986
    NTEE:
    EIN:
    41-1647799
    Location:
    Website:
    Founded:
    1989
    Employment trends:
  97. Wilderness Society

    Employees:
    175
    Revenue:
    $39,480,932
    NTEE:
    EIN:
    53-0167933
    Location:
    Website:
    Founded:
    1937
    Employment trends:
  98. Dollar Energy Fund

    Employees:
    170
    Revenue:
    $21,092,613
    NTEE:
    EIN:
    25-1442933
    Location:
    Website:
    Founded:
    1983
    Employment trends:
  99. Trail Blazer Camps

    Employees:
    170
    Revenue:
    $2,763,556
    NTEE:
    EIN:
    13-1771421
    Location:
    Website:
    Founded:
    1887
    Employment trends:
  100. Defenders of Wildlife

    Employees:
    166
    Revenue:
    $34,498,515
    NTEE:
    EIN:
    53-0183181
    Location:
    Website:
    Founded:
    1947
    Employment trends:

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