Connecticut · Grantmakers

Foundations That Fund Environment & Conservation in Connecticut

Imperigo has identified 166 funders that made 1,532 grants totaling $72.2M to 178 environment & conservation organizations in Connecticut, with a median grant of $16K. Every figure below is drawn from IRS Form 990 filings through 2025.

Environment & Conservation Funding in Connecticut

Total granted $72.2M
Funders 166
Grants 1,532
Organizations funded 178

Top Funders — page 1 of 4

1. Ww Good Foundation Inc
2 grants to 1 organization · largest $1.8M · through 2020 · 53.4% of their giving
$2.7M
2. The John T and Jane a Wiederhold Foundation
22 grants to 12 organizations · largest $182K · through 2025 · 20.9% of their giving
$1.4M
3. Northwest Connecticut Community Foundation Inc
17 grants to 7 organizations · largest $2.4M · through 2025 · 9.1% of their giving
$2.7M
4. The Connecticut Community Foundation
109 grants to 24 organizations · largest $112K · through 2024 · 8.6% of their giving
$2.5M
5. McLean Fund
4 grants to 1 organization · largest $297K · through 2022 · 44.1% of their giving
$1000K
6. The White Memorial Foundation Inc
6 grants to 1 organization · largest $161K · through 2024 · 100.0% of their giving
$932K
7. Fairfield County's Community Foundation Inc
46 grants to 21 organizations · largest $200K · through 2024 · 1.1% of their giving
$1.3M
8. New Canaan Community Foundation Inc
15 grants to 3 organizations · largest $108K · through 2024 · 3.5% of their giving
$385K
9. National Fish and Wildlife Foundation
40 grants to 14 organizations · largest $886K · through 2023
$4.7M
10. Health Care Advocates International Inc
2 grants to 1 organization · largest $80K · through 2023 · 7.9% of their giving
$156K
11. The Funders Network Inc
5 grants to 4 organizations · largest $84K · through 2024 · 4.2% of their giving
$282K
12. New Haven Green Fund Inc
8 grants to 6 organizations · largest $10K · through 2024 · 21.9% of their giving
$58K
13. The Community Foundation of Eastern Connecticut Inc
12 grants to 11 organizations · largest $180K · through 2024 · 1.8% of their giving
$660K
14. Hartford Foundation for Public Giving
44 grants to 15 organizations · largest $635K · through 2024
$1.5M
15. Main Street Community Foundation Inc
7 grants to 1 organization · largest $65K · through 2025 · 3.9% of their giving
$231K
16. Connecticut Humanities Council Inc
17 grants to 6 organizations · largest $169K · through 2024 · 1.1% of their giving
$608K
17. The Claire C Bennitt Watershed Fund Inc
3 grants to 3 organizations · largest $10K · through 2020 · 25.0% of their giving
$28K
18. The Community Foundation for Greater New Haven
25 grants to 11 organizations · largest $143K · through 2024
$726K
19. Essex Elementary School Foundationinc
3 grants to 1 organization · largest $8K · through 2023 · 12.1% of their giving
$24K
20. American Clean Power Association
2 grants to 1 organization · largest $50K · through 2024 · 3.2% of their giving
$90K
21. Inland Empire Community Foundation
1 grant to 1 organization · largest $500K · through 2022
$500K
22. The New York Architects' Regatta Foundation Ltd
1 grant to 1 organization · largest $16K · through 2019 · 12.0% of their giving
$16K
23. Restore America's Estuaries
6 grants to 5 organizations · largest $68K · through 2024 · 1.0% of their giving
$181K
24. American Chemistry Council
2 grants to 1 organization · largest $100K · through 2020 · 1.3% of their giving
$140K
25. E4thefuture Inc
4 grants to 3 organizations · largest $30K · through 2022 · 1.9% of their giving
$85K

Funders are ordered by how much of their overall giving goes to environment & conservation work in Connecticut, not by dollar totals alone — a foundation that concentrates its giving here is usually a better prospect than a larger one for which this is a rounding error. 13 of the funders counted here are donor-advised fund sponsors, which grant on behalf of individual donors and accept no applications; they are marked and ranked last.

Other Causes Funded in Connecticut

About This Data

A grant appears here when a funder reported it on its IRS Form 990 and the recipient organization is classified under the NTEE group covering environment & conservation work, with an address in Connecticut. Grants are counted from the 2025 filing year backward.

Some 990 grant schedules list a recipient by name and address without an EIN, and those grants cannot be matched to a classification — so the totals above represent identifiable environment & conservation funding in Connecticut, not every dollar that reached the sector. Figures are a floor, not a ceiling.

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