Zena is a hamlet (and census-designated place) in Ulster County, New York, United States.

Zena is one of the more wealthy areas of this region, with the average home value above $300,000.

[4] According to the United States Census Bureau, the CDP has a total area of 3.0 square miles (7.8 km2), all land.

On the northern end, it also includes the southern half of Chestnut Hill Rd and most of Witchtree Rd.

21.5% of all households were made up of individuals, and 7.6% had someone living alone who was 65 years of age or older.