Below is a list of Merrimack County NH zip codes. For your research we have also included Merrimack County Area Code, Time Zone, UTC and the local County FIPS Code. Each Merrimack County New Hampshire zip code has a center Longitude / Latitude point (the Merrimack County center is -71.690101623535 / 43.30419921875). For your convenience we have also indicated if that zip code in Merrimack County observes Daylight Savings time.