Below is a list of Wellesley Island NY zip codes. For your research we have also included Wellesley Island Area Code, Time Zone, UTC and the local Jefferson County FIPS Code. Each Wellesley Island New York zip code has a center Longitude / Latitude point (the Wellesley Island center is -76.010902404785 / 44.289001464844). For your convenience we have also indicated if that zip code in Wellesley Island observes Daylight Savings time.