Columbia Island, is an island in the Long Island Sound and part of New Rochelle, New York, United States. It is situated off the south-eastern coast of Davids Island, immediately adjacent to Pea Island. Before sea walls and other structures were built on the island, the exposed rock varied in size from about one acre to 175 square feet depending on the tide.

New Rochelle is a city in Westchester County, New York, United States. It is a suburb of New York City, located approximately 17 miles (27 km) from Midtown Manhattan. In 2020, the city had a population of 79,726, making it the 7th-largest city and 22nd-most populous municipality in New York. Some residents refer to the city as New Ro. A well-known destination within New Rochelle is "New Roc City," which has restaurants and entertainment venues.