- the text in this section is copied from an article in Wikipedia
Barnum Island is a hamlet and census-designated place (CDP) in Nassau County, New York, United States. The population was 2,414 at the 2010 census.
Barnum Island is an unincorporated area of the Town of Hempstead. Most of Barnum Island is separated from the Village of Island Park by the LIRR's Long Beach Branch rail line to Long Beach.
Barnum Island has its own fire district, but is under contract with the Island Park Fire Department for emergency services. Barnum Island is included in the Island Park School District and ZIP code 11558.