Below is a list of Windham NH zip codes. For your research we have also included Windham Area Code, Time Zone, UTC and the local Rockingham County FIPS Code. Each Windham New Hampshire zip code has a center Longitude / Latitude point (the Windham center is -71.304100036621 / 42.800998687744). For your convenience we have also indicated if that zip code in Windham observes Daylight Savings time.