Below is a list of Locust Valley NY zip codes. For your research we have also included Locust Valley Area Code, Time Zone, UTC and the local Nassau County FIPS Code. Each Locust Valley New York zip code has a center Longitude / Latitude point (the Locust Valley center is -73.584197998047 / 40.879100799561). For your convenience we have also indicated if that zip code in Locust Valley observes Daylight Savings time.