Below is a list of Jefferson Valley NY zip codes. For your research we have also included Jefferson Valley Area Code, Time Zone, UTC and the local Westchester County FIPS Code. Each Jefferson Valley New York zip code has a center Longitude / Latitude point (the Jefferson Valley center is -73.791496276855 / 41.337299346924). For your convenience we have also indicated if that zip code in Jefferson Valley observes Daylight Savings time.