The full form of NY is New York. It’s used on Regional ,States & Districts in United States

New York is a state in the Northeastern region of the United States. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east. The state has a maritime border with Rhode Island east of Long Island, as well as an international border with the Canadian provinces of Ontario to the north and west, and Quebec to the north. The state of New York is often referred to as New York State to distinguish it from the city of New York.