Below is a list of Marlborough CT zip codes. For your research we have also included Marlborough Area Code, Time Zone, UTC and the local Hartford County FIPS Code. Each Marlborough Connecticut zip code has a center Longitude / Latitude point (the Marlborough center is -72.459899902344 / 41.63159942627). For your convenience we have also indicated if that zip code in Marlborough observes Daylight Savings time.