Below is a list of Mount Washington NH zip codes. For your research we have also included Mount Washington Area Code, Time Zone, UTC and the local Coos County FIPS Code. Each Mount Washington New Hampshire zip code has a center Longitude / Latitude point (the Mount Washington center is -71.551300048828 / 44.345401763916). For your convenience we have also indicated if that zip code in Mount Washington observes Daylight Savings time.