Below is a list of Guilford CT zip codes. For your research we have also included Guilford Area Code, Time Zone, UTC and the local New Haven County FIPS Code. Each Guilford Connecticut zip code has a center Longitude / Latitude point (the Guilford center is -72.68399810791 / 41.287899017334). For your convenience we have also indicated if that zip code in Guilford observes Daylight Savings time.