Data / Nonprofits / Connecticut / South Norwalk
Nonprofits in South Norwalk, CT: 4 registered with the IRS
4 nonprofits are registered with the IRS in South Norwalk, CT, 4 of them 501(c)(3) charities; the 2 that report revenue took in $20.6 million. The largest by revenue: The Maritime Aquarium at Norwalk Inc ($20.5 million), Canaan Intitutional Baptist Church ($104,831).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| The Maritime Aquarium at Norwalk Inc | Arts, culture and humanities | 501(c)(3) | 1985 | $20.5 million | $32 million | 2025-06 |
| Canaan Intitutional Baptist Church | Religion-related | 501(c)(3) | 1995 | $104,831 | $63,995 | 2021-12 |
| Alexander Family Foundation Inc | 501(c)(3) | 1963 | $4.1 million | 2025-12 | ||
| St Joseph and St Ladislaus Parish | 501(c)(3) | 1946 |
Nonprofits in every city of the state
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.