Data / Nonprofits / New Hampshire / Environment
Environment nonprofits in New Hampshire: 261 registered with the IRS
261 environment nonprofits are registered with the IRS in New Hampshire, 253 of them 501(c)(3) charities; the 91 that report revenue took in $99.2 million. The most are in Concord (21), New London (6), Holderness (5). The largest by revenue: Society for the Protection of New Hampshire Forests ($13.3 million), New Hampshire Recycles ($7.8 million), The Monadnock Conservancy ($6.9 million).
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Every organization, largest by revenue first
| Organization | City | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Society for the Protection of New Hampshire Forests | Concord | 501(c)(3) | 1986 | $13.3 million | $115.4 million | 2025-04 |
| New Hampshire Recycles | Epsom | 501(c)(3) | 1987 | $7.8 million | $2.4 million | 2025-09 |
| The Monadnock Conservancy | Keene | 501(c)(3) | 1990 | $6.9 million | $21 million | 2025-09 |
| Squam Lakes Natural Science Center | Holderness | 501(c)(3) | 1967 | $6.2 million | $15 million | 2025-12 |
| Upper Valley Land Trust Inc | Hanover | 501(c)(3) | 1990 | $4.4 million | $26.3 million | 2025-06 |
| Sustainable Forest Futures Inc | Concord | 501(c)(3) | 2006 | $4.2 million | $23.3 million | 2025-04 |
| Audubon Society of New Hampshire | Concord | 501(c)(3) | 1944 | $3.8 million | $24.2 million | 2025-03 |
| New England Grassroots Environment Fund Inc | Newmarket | 501(c)(3) | 2000 | $3.4 million | $8.2 million | 2024-12 |
| Kroka Expeditions | Marlow | 501(c)(3) | 1997 | $3.1 million | $4.6 million | 2024-12 |
| Squam Lakes Association | Holderness | 501(c)(3) | 1955 | $2.9 million | $12.8 million | 2024-12 |
| Lakes Region Conservation Trust | Center Harbor | 501(c)(3) | 1981 | $2.9 million | $38.8 million | 2025-03 |
| Harris Center for Conservation Education Inc | Hancock | 501(c)(3) | 1970 | $2.9 million | $22.6 million | 2025-06 |
| Legado Inc | Jackson | 501(c)(3) | 2017 | $2.7 million | $2.3 million | 2025-12 |
| Beaver Brook Association Inc | Hollis | 501(c)(3) | 1965 | $2.4 million | $11.6 million | 2025-05 |
| Ammonoosuc Conservation Trust | Franconia | 501(c)(3) | 2000 | $2.4 million | $6.1 million | 2025-06 |
| Lake Sunapee Protective Association | Sunapee | 501(c)(3) | 1982 | $2.1 million | $8.2 million | 2025-12 |
| Clean Energy NH | Concord | 501(c)(3) | 2005 | $2 million | $1.6 million | 2024-12 |
| Ausbon Sargent Land Preservation Trust | New London | 501(c)(3) | 1988 | $1.8 million | $10.9 million | 2025-06 |
| New Hampshire Lakes Association Inc | Concord | 501(c)(3) | 1986 | $1.8 million | $792,004 | 2025-03 |
| Us Plastics Pact LLC | Walpole | 501(c)(3) | 2023 | $1.6 million | $1.2 million | 2024-12 |
| Tin Mountain Conservation Center Incorporated | Albany | 501(c)(3) | 1990 | $1.4 million | $4.2 million | 2025-09 |
| Newfound Lake Region Association | Hebron | 501(c)(3) | 1994 | $1.4 million | $5.8 million | 2025-12 |
| Loon Preservation Committee | Moultonboro | 501(c)(3) | 2007 | $1.3 million | $4.2 million | 2026-03 |
| Hubbard Brook Research Foundation Inc | Thornton | 501(c)(3) | 1995 | $1.2 million | $2.1 million | 2025-09 |
| Squam Lakes Conservation Society | Holderness | 501(c)(3) | 1988 | $1.1 million | $19.8 million | 2025-12 |
| Plymouth Area Renewable Energy Initiative | Plymouth | 501(c)(3) | 2004 | $791,033 | $153,030 | 2025-12 |
| Chocorua Lake Conservancy | Tamworth | 501(c)(3) | 2012 | $728,027 | $4.1 million | 2024-12 |
| Student-Led Sustainable Initiatives Inc | Dover | 501(c)(3) | 2014 | $714,073 | $303,364 | 2025-08 |
| Land for Good Inc | Keene | 501(c)(3) | 2007 | $657,923 | $239,815 | 2024-12 |
| Great Bay Stewards Inc | Greenland | 501(c)(3) | 1996 | $647,150 | $726,492 | 2025-12 |
| Moose Mountains Regional Greenways | Union | 501(c)(3) | 2000 | $641,556 | $4.2 million | 2024-12 |
| Hanover Conservancy | Hanover | 501(c)(3) | 1966 | $572,999 | $5.1 million | 2025-06 |
| 350 New Hampshire | Dover | 501(c)(3) | 2022 | $513,172 | $107,555 | 2024-12 |
| Bedrock Gardens | Lee | 501(c)(3) | 2014 | $484,583 | $2.1 million | 2024-12 |
| Francestown Land Trust Inc | Francestown | 501(c)(3) | 1988 | $466,822 | $2 million | 2025-12 |
| Graylag Nature Preserve Inc | Pittsfield | 501(c)(3) | 2020 | $456,956 | $1.7 million | 2024-12 |
| American Ground Water Trust | Hooksett | 501(c)(3) | 1974 | $407,184 | $145,838 | 2025-12 |
| New Hampshire Businesses for Social Responsibility | Concord | 501(c)(3) | 2003 | $376,890 | $36,490 | 2025-06 |
| Bearpaw Regional Greenways | Northwood | 501(c)(3) | 1997 | $350,074 | $4.8 million | 2024-12 |
| Green Mountain Conservation Group | Effingham | 501(c)(3) | 1999 | $347,839 | $1.2 million | 2025-12 |
| Forest Lake Improvement Association of Winchester NH | Winchester | 501(c)(3) | 2021 | $332,230 | $444,626 | 2024-12 |
| North Country Alliance for Balanced Change | Littleton | 501(c)(4) | 2020 | $308,975 | $188,867 | 2024-12 |
| Seabrook-Hamptons Estuary Alliance | Hampton | 501(c)(3) | 2017 | $298,772 | $30,368 | 2025-12 |
| Partridge Lake Property Owners Association | Littleton | 501(c)(3) | 2009 | $289,524 | $109,721 | 2025-12 |
| La Cruz Habitat Protection Project | Keene | 501(c)(3) | 2007 | $278,899 | $93,606 | 2024-12 |
| Lamprey River Wateshed Association | Lee | 501(c)(3) | 1994 | $259,711 | $34,653 | 2025-09 |
| Acton-Wakefield Watersheds Alliance Inc | Union | 501(c)(3) | 2006 | $248,360 | $161,636 | 2024-12 |
| New Hampshire the Beautiful Inc | Manchester | 501(c)(3) | 1984 | $244,250 | $503,797 | 2025-10 |
| Bow Open Spaces Inc | Bow | 501(c)(3) | 1997 | $236,845 | $407,314 | 2025-06 |
| Granite State Woodland Institute | Concord | 501(c)(3) | 2002 | $232,875 | $546,408 | 2025-09 |
| New Hampshire Association of Conservation Districts | Concord | 501(c)(3) | 1975 | $223,583 | $26,236 | 2024-12 |
| Winnisquam Watershed Network | Winnisquam | 501(c)(3) | 2017 | $214,664 | $274,236 | 2025-12 |
| Nansen Ski Club Inc | Berlin | 501(c)(3) | 2011 | $205,667 | $848,511 | 2025-06 |
| New Hampshire Rivers Council | Concord | 501(c)(3) | 1994 | $197,499 | $625,482 | 2025-12 |
| Friends of The@concord - Lake Sunapee Rail Trail | Warner | 501(c)(3) | 2017 | $159,277 | $1.8 million | 2025-12 |
| Granite Outdoor Alliance | Conway | 501(c)(3) | 2021 | $152,572 | $50,717 | 2024-12 |
| Friends of Big Island Pond | Hampstead | 501(c)(3) | 2009 | $147,859 | $1.2 million | 2025-12 |
| Wentworth Watershed Association | Wolfeboro | 501(c)(3) | 1997 | $145,870 | $3.5 million | 2024-12 |
| New Hampshire Association of Conservation Commissions | Concord | 501(c)(3) | 1974 | $139,095 | $191,052 | 2025-12 |
| Leadership Seacoast | Portsmouth | 501(c)(3) | 1991 | $126,490 | $48,132 | 2025-08 |
| Arlington Pond Protective Association | Salem | 501(c)(3) | 2007 | $125,594 | $768,315 | 2024-12 |
| Gilmanton Land Trust | Gilmanton | 501(c)(3) | 1999 | $117,867 | $65,366 | 2025-06 |
| Country Pond Lake Association | Newton | 501(c)(3) | 2017 | $113,879 | $42,582 | 2025-12 |
| New Hampshire Environmental Educators | Holderness | 501(c)(3) | 2014 | $113,763 | $133,228 | 2025-12 |
| Spofford Lake Association | Spofford | 501(c)(3) | 2002 | $110,766 | $306,078 | 2025-12 |
| Friends of Moeckel Pond | Windham | 501(c)(3) | 2011 | $103,339 | $161,431 | 2024-12 |
| Appalachian Long Distance Hikers Association Inc | West Lebanon | 501(c)(3) | 2004 | $97,123 | $156,988 | 2025-12 |
| Three Ponds Protective Association | Milton | 501(c)(3) | 2014 | $88,814 | $136,414 | 2025-12 |
| Balch Lake Improvement Organization Blimp | E Wakefield | 501(c)(3) | 2003 | $79,957 | $184,255 | 2025-12 |
| NH Healthy Climate Inc | Manchester | 501(c)(3) | 2022 | $73,371 | $47,515 | 2024-12 |
| Pleasant Lake Protective Association | New London | 501(c)(3) | 2007 | $72,355 | $355,316 | 2025-12 |
| Millville Lake Protective Assoc | North Salem | 501(c)(3) | 2017 | $68,810 | $446,168 | 2025-12 |
| Crescent Lake Environmental Action Response Clear Trust | Newport | 501(c)(3) | 2023 | $68,200 | $62,138 | 2024-12 |
| Connecticut River Joint Commissions Inc | Lebanon | 501(c)(3) | 1991 | $67,866 | $30,681 | 2025-06 |
| Lake Kanasatka Watershed Assoc | Center Harbor | 501(c)(3) | 2021 | $66,679 | $415,945 | 2026-06 |
| Plymouth Rotary Foundation | Plymouth | 501(c)(3) | 2007 | $63,348 | $403,467 | 2025-06 |
| Friends of Distant Hill | Walpole | 501(c)(3) | 2020 | $52,050 | $68,553 | 2025-12 |
| Merrymeeting Lake Association | New Durham | 501(c)(3) | 2004 | $51,534 | $187,181 | 2023-12 |
| Half Moon Lake Association | Center Barnstead | 501(c)(3) | 2023 | $50,630 | $22,932 | 2024-12 |
| Cobbetts Pond Improvement Association Inc | Windham | 501(c)(3) | 2009 | $37,831 | $123,942 | 2025-12 |
| Nippo Lake Association Inc of Barrington NH | Barrington | 501(c)(3) | 2016 | $37,250 | $77,065 | 2025-12 |
| Northwood Lake Watershed Association | Northwood | 501(c)(3) | 1994 | $31,682 | $182,633 | 2025-12 |
| Oh Association Inc | Intervale | 501(c)(3) | 2020 | $29,859 | $162,856 | 2025-12 |
| Pawtuckaway Lake Improvement Association | Nottingham | 501(c)(3) | 2015 | $18,934 | $55,145 | 2025-12 |
| New Hampshire Project Learning Tree | Concord | 501(c)(3) | 1996 | $14,250 | $33,870 | 2025-09 |
| Mirror Lake Protective Association Inc | Mirror Lake | 501(c)(3) | 1996 | $13,049 | $54,893 | 2025-07 |
| PZ Park | Wolfeboro Falls | 501(c)(3) | 2025 | $7,660 | $138,475 | 2025-12 |
| Pasquaney Garden Club | Alexandria | 501(c)(3) | 2011 | $5,049 | $10,817 | 2025-12 |
| Friends of Reservoir Pond Inc | Lyme | 501(c)(3) | 2022 | $4,398 | $51,931 | 2025-12 |
| Rock Pond Improvement Association Inc | Windham | 501(c)(3) | 2017 | $3,850 | $16,976 | 2025-12 |
| Love Our Mother Inc | Amherst | 501(c)(3) | 2020 | $20 | $20 | 2025-12 |
| A Childs Inspiration Wildlife Discovery Garden | Wentworth | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Access Conservation | Marlow | 501(c)(3) | 2024 | $0 | $0 | 2026-03 |
| Amherst Garden Club Inc | Amherst | 501(c)(3) | 2002 | $0 | $0 | 2026-06 |
| Ashland Garden Club | Ashland | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Atkinson Garden Club | Atkinson | 501(c)(3) | 2026 | $0 | $0 | 2025-05 |
| Baker River Watershed Association | Plymouth | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Baptist Pond Protective Association | Georges Mills | 501(c)(3) | 2026 | |||
| Bearcamp Pond Association | Sandwich | 501(c)(3) | 2015 | $0 | $0 | 2025-07 |
| Bebop Labs | Salisbury | 501(c)(3) | 2019 | $0 | $0 | 2025-09 |
| Bedford Garden Club | Bedford | 501(c)(3) | 2000 | $0 | $0 | 2025-06 |
| Beech Hill-Dublin Lake Watershed Association | Dublin | 501(c)(3) | 2006 | $2.8 million | 2024-12 | |
| Belknap Association for Natural Resources Conservation | Center Harbor | 501(c)(3) | 2008 | $0 | $12,388 | 2025-12 |
| Belknap Range Trail Tenders | Sanbornton | 501(c)(3) | 2014 | $7,475 | 2025-12 | |
| Big Pea Porridge Watershed Preservation Association | Eaton | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Boisvert-Normand Nature Preserve | Thornton | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Captains Pond Protective Association Inc | Salem | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Carroll County Forest Fire Wardens Association | Brookfield | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Central New Hampshire Climbers Association | Campton | 501(c)(3) | 2023 | $0 | $0 | 2026-06 |
| Central New Hampshire Forest Fire Wardens Association Inc | Epsom | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Chestnut Revival Inc | Swanzey | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Clean Energy New Hampshire Association | Concord | 501(c)(6) | 2025 | |||
| Collaborative Solid Waste Strategies | Penacook | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Colonial Garden Club of Hollis New Hampshire | Hollis | 501(c)(3) | 2020 | $0 | $0 | 2026-08 |
| Concord Greenspace Coalition | Concord | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Contoocook Lake Area Preservation Association | Jaffrey | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Contoocook River Improvement Society | Concord | 501(c)(3) | 2020 | $0 | $0 | 2026-06 |
| Crystal Lake Preservation LTD | Manchester | 501(c)(3) | 1994 | $0 | $0 | 2025-12 |
| Danville Long Pond Protective Association | Danville | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Derry Garden Club | Derry | 501(c)(3) | 2011 | $0 | $0 | 2026-05 |
| Earth Bound & Wild Collective | Derry | 501(c)(3) | 2026 | |||
| Eastman Charitable Foundation | Grantham | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Environmental Action for Northern New Hampshire | Bethlehem | 501(c)(3) | 1999 | $0 | $0 | 2024-12 |
| Equilibrium Project Foundation | Portsmouth | 501(c)(3) | 2022 | $572,782 | 2025-12 | |
| Evergreen Foundation | Goffstown | 501(c)(3) | 2017 | $341,827 | 2024-12 | |
| Flannerys Tree Care Inc | Madbury | 501(c)(3) | 2024 | |||
| Flint Pond Improvement Association | Hollis | 501(c)(3) | 1996 | $0 | $0 | 2026-06 |
| Foundation for Coral Restoration Inc | Dover | 501(c)(3) | 2025 | |||
| Franklin Pierce Lake Association | Hillsborough | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Friends of Historic Long Pond Dam of Danville-Kingston | Danville | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Friends of Island Park Inc | Chesterfield | 501(c)(3) | 2026 | |||
| Friends of Lyford Pond | Canterbury | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Friends of Martin Meadow Pond | Marlborough | 501(c)(4) | 2016 | $0 | $0 | 2025-12 |
| Friends of Mount Sunapee | Georges Mills | 501(c)(3) | 2005 | $0 | $0 | 2025-12 |
| Friends of Northwood Meadows State Park | Strafford | 501(c)(4) | 2017 | $0 | $0 | 2024-12 |
| Friends of Sargent | Dublin | 501(c)(3) | 2013 | $0 | $0 | 2024-12 |
| Friends of Tuckerman Ravine | Intervale | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Friends of the Arboretm at Ashuelot River Park | Marlborough | 501(c)(3) | 2019 | $0 | $0 | 2026-06 |
| Friends of the Grout Hill Gardens | Acworth | 501(c)(3) | 2016 | $0 | $0 | 2024-12 |
| Friends of the Ledges | North Conway | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Friends of the Suncook River | Pittsfield | 501(c)(3) | 2004 | $0 | $0 | 2025-08 |
| Garden Club of Deerfield | Deerfield | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Garden Club of Dublin N H | Dublin | 501(c)(3) | 1979 | $0 | $0 | 2025-08 |
| Garden at Tracy Library | New London | 501(c)(3) | 2008 | $0 | $0 | 2025-12 |
| Generations To Come | Peterborough | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Geological Society of New Hampshire Inc | Concord | 501(c)(3) | 2025 | |||
| Geospatial and Environmentaltechnologies Institute | Durham | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Gilford Islands Association | Rye | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Gilmore Pond Association Inc | Jaffrey | 501(c)(4) | 2014 | $0 | $0 | 2026-06 |
| Global Entomology Coalition | Rochester | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Goose Pond Lake Association | Enfield | 501(c)(3) | 2006 | $0 | $0 | 2024-12 |
| Granite Advancement Project | Raymond | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Granite Lake Association Incorporated | Nelson | 501(c)(3) | 2017 | $0 | $0 | 2025-06 |
| Grantham Garden Club | Grantham | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Great Himalaya Trail Project | Exeter | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Great Island Garden Club | New Castle | 501(c)(3) | 2009 | $0 | $0 | 2025-06 |
| Green Start | Lee | 501(c)(3) | 2007 | $0 | $0 | 2024-12 |
| Green Team of Londonderry | Londonderry | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Green Woodlands Foundation | Lyme | 501(c)(3) | 2011 | $1.1 million | 2025-08 | |
| Guatemala Water Foundation | Windham | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Gumpas Pond Preservation Association | Pelham | 501(c)(3) | 2024 | |||
| Hampstead Garden Club | Hampstead | 501(c)(3) | 1996 | $0 | $0 | 2025-12 |
| Harvey Lake Association | Northwood | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Headwaters & Marine Stewards | Portsmouth | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Hillsborough Area Renewable Energy Initiative | Mont Vernon | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Howfirma Trust | South Hampton | 501(c)(3) | 1997 | $4.6 million | 2025-11 | |
| Indigenous Landscape Initiative | New Ipswich | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Institute for Community Business & the New Hampshire Economy | Concord | 501(c)(3) | 1997 | $0 | $0 | 2025-12 |
| Jacksons Eastside Walk Foundation | Jackson | 501(c)(3) | 1995 | $283,878 | 2025-12 | |
| John Elwyn Stone Trust Uw | Manchester | 501(c)(3) | 1975 | $6.8 million | 2025-12 | |
| Keenesnoriders | Keene | 501(c)(3) | 2016 | $0 | $0 | 2025-04 |
| Kezar Lake Protective Association | North Sutton | 501(c)(3) | 2016 | $0 | $0 | 2024-12 |
| Kingston Lake Association | Kingston | 501(c)(3) | 2008 | $0 | $0 | 2025-12 |
| Kolelemook Lake Protective Association | Springfield | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Lake Armington Association Inc | Piermont | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Lake Horace Land Owners Corporation | Weare | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Lake Massasecum Improvement Association Inc | Bradford | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Lake Millen Association | Washington | 501(c)(4) | 2009 | $0 | $0 | 2025-12 |
| Lake Opechee Preservation Association | Lakeport | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Lake Wicwas Association Inc | Meredith | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Little Island Pond Association | Pelham | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Little Sunapee Protective Association | New London | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Loon Lake of Freedom Association | Freedom | 501(c)(3) | 2005 | $0 | $0 | 2024-12 |
| Lyme Pinnacle Snowmobile Club | Lyme | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Mascoma Lake Community Association | Enfield | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Mascoma Watershed Conservation Council | Lebanon | 501(c)(3) | 1999 | $0 | $0 | 2024-12 |
| Meriden Bird Club | Plainfield | 501(c)(3) | 2014 | $78,698 | 2024-12 | |
| Mernia | Meredith | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Merrimack Garden Club | Merrimack | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Messer Pond Protective Assoc | New London | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| Mildred Dunham Conservancy | Jaffrey | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Milfoil Crisis Committee | Meredith | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Monadnock Climbers Association | Peterborough | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Monadnock-Sunapee Greenway Trail Club Inc | Marlow | 501(c)(3) | 1995 | $0 | $0 | 2025-12 |
| Monomonac Lake Property Owners Assoc | Rindge | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Namaske Lake Association | Manchester | 501(c)(3) | 2009 | $0 | $0 | 2025-06 |
| National Bee and Farmland Preservation Foundation | Hollis | 501(c)(3) | 2025 | |||
| New England Waterfowl Association | Nashua | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| New Hampshire Agriculture in the Classroom | Concord | 501(c)(3) | 1993 | $0 | $0 | 2026-06 |
| New Hampshire Interfaith Power and Light | Canterbury | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| New Hampshire Land Trust Coalition | Concord | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| New Hampshire Public Interest Research Group Inc | Concord | 501(c)(4) | 1999 | $0 | $0 | 2025-06 |
| New Hampshire Tree Farm Program | Concord | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| New Hampshire Wildlife Coalition | Webster | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| New Hampton Garden Club | New Hampton | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| New London Garden Club | New London | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Newfields Garden Club | Newfields | 501(c)(3) | 2024 | $0 | $0 | 2026-05 |
| Nichols Smith Conservation Land Trust | Hollis | 501(c)(3) | 1997 | $0 | $0 | 2024-12 |
| Old Homestead Garden Club | Swanzey | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Ossipee Garden Club | Ossipee | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Ossipee Lake Alliance Inc | Freedom | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Otter Pond Protective Association | Georges Mills | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Oyster River Watershed Association | Madbury | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| PRP Association Inc | Sanbornville | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Pemigewasset Lake Preservation Asso Ciation | Meredith | 501(c)(3) | 2026 | |||
| Pentatucket Conservation Trust | Bedford | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Perkins Pond Protective Association | Sunapee | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Peterborough Renewable Energy Project | Peterborough | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Pittsburg Anglers Association Inc | Pittsburg | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Porter Lake Association | Plaistow | 501(c)(3) | 2006 | $0 | $0 | 2024-12 |
| Prescott Conservancy Inc | Laconia | 501(c)(3) | 2023 | $7.5 million | 2024-12 | |
| Project NG Inc | Durham | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Province Lake Association | Effingham | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Public Good Exchange | Newmarket | 501(c)(3) | 2026 | |||
| Reservoir Woods Foundation | Walpole | 501(c)(3) | 2020 | $4.5 million | 2025-12 | |
| Residents Environmental Action Committee for Health | Contoocook | 501(c)(3) | 2005 | $0 | $0 | 2023-12 |
| Rocky Pond Lake Association | Gilmanton | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Rockybound Pond Association Inc | Hanover | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Roland Park Land Trust | Concord | 501(c)(3) | 1997 | $0 | $0 | 2025-12 |
| Rollinsford Garden and Local Sustainability Club | Rollinsford | 501(c)(3) | 2014 | $0 | $0 | 2026-01 |
| Rumney Climbers Association | Plymouth | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| S T A L Service-To-All-Life Foundation | Sanbornton | 501(c)(3) | 2024 | $0 | $0 | 2023-12 |
| Sandown Garden Club | Sandown | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Seacoast Anti Pollution League | Portsmouth | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Seacoast Climate Action Now | Portsmouth | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Second Chances Crazy Cool Consignme NTS | Goffstown | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Silver Lake Association of Madison NH | Silver Lake | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Society for the Preservation of Rockwood Pond | Fitzwilliam | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Stinson Lake Association Inc | Rumney | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Strafford Garden Club | Strafford | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Suncook Lake Association | Center Barnstead | 501(c)(3) | 2026 | |||
| Swains Lake Association Inc | Barrington | 501(c)(4) | 2015 | $0 | $0 | 2025-12 |
| Teach Green Charitable Foundation | Nashua | 501(c)(3) | 2008 | $4.8 million | 2025-10 | |
| The Blaisdell Lake Protective Association Inc | South Sutton | 501(c)(3) | 2000 | $0 | $0 | 2026-04 |
| The Canaan Lake Association | Canaan | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| The Carl Siemon Family Charitable Trust | Milton Mills | 501(c)(3) | 1996 | $14.2 million | 2025-12 | |
| The Madison Garden Club | Silver Lake | 501(c)(3) | 1996 | $0 | $0 | 2024-12 |
| Thorndike Pond Conservation Association | Jaffrey | 501(c)(3) | 2002 | $0 | $0 | 2026-06 |
| Trees4haiti | Salem | 501(c)(3) | 2022 | $0 | $0 | 2025-06 |
| Tribal Clean Energy Services | Rye | 501(c)(3) | 2024 | |||
| Upper Merrimack Watershed Association | Penacook | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Us Green Building Council New Hampshire Chapter | Francestown | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Vermont New Hampshire Chapter of the American Chestnut Foundation | Holderness | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| WWW Land Conservancy | Weare | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Webster Lake Association | Franklin | 501(c)(3) | 2010 | $0 | $0 | 2026-07 |
| White Mountain Garden Club | Franconia | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| White Mt Horticultural Research Fou Ndation | Harrisville | 501(c)(3) | 2026 | |||
| Wild Spaces Collective | Milford | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Wilmot Garden Club | Wilmot | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Wonalancet Out Door Club | Wonalancet | 501(c)(3) | 2005 | $0 | $0 | 2025-12 |
| Yankee District American Rose Society | Bedford | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
Every nonprofit in New Hampshire
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.