Below is a list of Merrimack NH zip codes. For your research we have also included Merrimack Area Code, Time Zone, UTC and the local Hillsborough County FIPS Code. Each Merrimack New Hampshire zip code has a center Longitude / Latitude point (the Merrimack center is -71.493301391602 / 42.869598388672). For your convenience we have also indicated if that zip code in Merrimack observes Daylight Savings time.