National Natural Landmarks

Iona Island Marsh

Iona Island Marsh
Iona Island Marsh

Iona Island Marsh is a brackish estuarine marsh in a near natural state that fringes the Hudson River. The site also contains many rare plants.

Location: Rockland County, NY ; Rockland County, NY

Year designated: 1974

Acres: 252

Ownership: State

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Please remember, National Natural Landmarks (NNLs) are not national parks. NNLs are owned by a variety of public and private entities and allowing visitation is at their discretion. Many NNL sites maintain public websites where additional information may be found.


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