Below is a list of Killingworth CT zip codes. For your research we have also included Killingworth Area Code, Time Zone, UTC and the local Middlesex County FIPS Code. Each Killingworth Connecticut zip code has a center Longitude / Latitude point (the Killingworth center is -72.565498352051 / 41.358501434326). For your convenience we have also indicated if that zip code in Killingworth observes Daylight Savings time.