The Nannen Arboretum is an eight-acre (3.2 ha) arboretum and botanical garden located at 28 Parkside Drive, Ellicottville, New York.

The arboretum was organized in 1976 and contains over 250 species of trees, shrubs, flowers, and herbs.

The Nannen Arboretum was affiliated with the Cornell Cooperative Extension prior to 2013, at which time the arboretum was transferred to the Town of Ellicottville.

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