| Greater Newark ConservancyEIN 22-2691309 | Environment | NJ | $2,379,905Small | 92.75 |
| Greater Yellowstone CoalitionEIN 81-0414042 | Environment | MT | $3,385,142Small | 97.84 |
| Green AmericaEIN 52-1660746 | Environment | DC | $3,924,265Mid-sized | 88.87 |
| Green Mountain ClubEIN 03-0162865 | Environment | VT | $1,702,815Small | 89.76 |
| Greenbelt AllianceEIN 94-1676747 | Environment | CA | $2,489,805Small | 89.69 |
| Greenpeace FundEIN 95-3313195 | Environment | DC | $19,137,869Large | 92.38 |
| Group for the East EndEIN 13-6379135 | Environment | NY | $1,055,007Small | 90.61 |
| GrowNYCEIN 13-2765465 | Environment | NY | $14,554,397Large | 94.69 |
| Gulf of Maine Research InstituteEIN 01-0504905 | Environment | ME | $10,055,075Mid-sized | 93.60 |
| Harris Center for Conservation EducationEIN 23-7085105 | Environment | NH | $1,333,555Small | 92.22 |
| Healthy GulfEIN 72-1447742 | Environment | LA | $1,154,622Small | 88.68 |
| Hermann Park ConservancyEIN 76-0327389 | Environment | TX | $4,590,301Mid-sized | 93.81 |
| Hidden VillaEIN 94-1539836 | Environment | CA | $3,910,117Mid-sized | 97.13 |
| Hitchcock CenterEIN 04-2487748 | Environment | MA | $770,973Small | 77.40 |
| Houston Parks BoardEIN 74-1860046 | Environment | TX | $22,107,401Large | 94.34 |
| Hudson River Sloop ClearwaterEIN 14-6049022 | Environment | NY | $2,470,234Small | 81.25 |
| Huntsville Botanical GardenEIN 63-0800109 | Environment | AL | $4,048,002Mid-sized | 89.76 |
| Huron River Watershed CouncilEIN 38-1806452 | Environment | MI | $1,487,897Small | 94.06 |
| I Love A Clean San Diego CountyEIN 95-2566791 | Environment | CA | $1,383,646Small | 75.88 |
| Idaho Conservation LeagueEIN 82-6042478 | Environment | ID | $1,970,384Small | 91.68 |
| Iditarod Trail CommitteeEIN 92-0043991 | Environment | AK | $4,642,759Mid-sized | 67.72 |
| Institute for Transportation and Development PolicyEIN 52-1399520 | Environment | NY | $7,664,135Mid-sized | 87.62 |
| Interfaith Power & LightEIN 94-3335236 | Environment | CA | $1,481,890Small | 82.03 |
| International Conservation Caucus FoundationEIN 83-0449176 | Environment | DC | $1,401,209Small | 77.40 |
| International RiversEIN 94-3158295 | Environment | CA | $2,122,078Small | 82.97 |
| Irvine Nature CenterEIN 52-1231286 | Environment | MD | $1,926,838Small | 90.75 |
| Island PressEIN 94-2578166 | Environment | DC | $4,526,796Mid-sized | 89.27 |
| Izaak Walton League of AmericaEIN 36-1930035 | Environment | MD | $2,407,893Small | 85.81 |
| Jackson Hole Conservation AllianceEIN 83-0245647 | Environment | WY | $720,418Small | 86.39 |
| James River AssociationEIN 51-0211913 | Environment | VA | $1,942,172Small | 88.07 |
| Jenkins Arboretum & GardensEIN 23-2726419 | Environment | PA | $1,101,078Small | 84.21 |
| Keep Indianapolis BeautifulEIN 31-1005792 | Environment | IN | $3,788,027Mid-sized | 86.87 |
| Keep Pennsylvania BeautifulEIN 25-1645291 | Environment | PA | $898,818Small | 92.69 |
| Land Stewardship ProjectEIN 41-1466054 | Environment | MN | $2,524,386Small | 87.93 |
| LAND studioEIN 34-1212421 | Environment | OH | $3,900,114Mid-sized | 86.27 |
| Land Trust AllianceEIN 04-2751357 | Environment | DC | $15,111,306Large | 90.85 |
| Lauritzen GardensEIN 47-0659701 | Environment | NE | $6,507,988Mid-sized | 84.42 |
| League of Conservation Voters Education FundEIN 52-1379661 | Environment | DC | $18,493,698Large | 92.02 |
| League to Save Lake TahoeEIN 94-6128680 | Environment | CA | $2,194,842Small | 85.65 |
| Leave No Trace Center for Outdoor EthicsEIN 84-1303335 | Environment | CO | $1,905,401Small | 91.90 |
| Lewis Ginter Botanical GardenEIN 54-1273467 | Environment | VA | $8,265,053Mid-sized | 95.14 |
| LightHawkEIN 84-0852104 | Environment | CO | $1,589,618Small | 85.34 |
| Living Lands and WatersEIN 36-4244353 | Environment | IL | $2,001,281Small | 92.43 |
| Lloyd Center for the EnvironmentEIN 04-3066693 | Environment | MA | $761,737Small | 87.94 |
| Los Angeles WaterkeeperEIN 95-4444787 | Environment | CA | $1,246,299Small | 82.14 |
| Loyalhanna Watershed AssociationEIN 23-7135993 | Environment | PA | $681,889Small | 84.54 |
| Madison Square Park ConservancyEIN 14-1859935 | Environment | NY | $4,811,212Mid-sized | 85.67 |
| Maine AudubonEIN 01-0248780 | Environment | ME | $2,415,412Small | 87.16 |
| Maine Center for Coastal FisheriesEIN 27-0069386 | Environment | ME | $1,664,926Small | 94.15 |
| ManometEIN 22-3051362 | Environment | MA | $4,959,830Mid-sized | 89.86 |
| Marine Conservation InstituteEIN 91-1725640 | Environment | WA | $1,068,198Small | 81.68 |
| Massachusetts Audubon SocietyEIN 04-2104702 | Environment | MA | $29,467,469Large | 95.33 |
| Massachusetts Horticultural SocietyEIN 04-2104714 | Environment | MA | $1,690,583Small | 83.57 |
| McKee Botanical GardenEIN 65-1189895 | Environment | FL | $1,443,755Small | 81.60 |
| Michigan Environmental CouncilEIN 38-2517980 | Environment | MI | $2,324,269Small | 91.73 |
| Mill River Park CollaborativeEIN 06-1507648 | Environment | CT | $1,758,191Small | 91.45 |
| Minnesota Center for Environmental AdvocacyEIN 23-7412105 | Environment | MN | $1,692,871Small | 93.82 |
| Minnesota Environmental FundEIN 41-1693030 | Environment | MN | $964,468Small | 86.29 |
| Minnesota Environmental PartnershipEIN 41-1986433 | Environment | MN | $651,587Small | 90.47 |
| Mission BlueEIN 26-1892969 | Environment | CA | $1,261,676Small | 80.39 |