Below is a list of Waipahu HI zip codes. For your research we have also included Waipahu Area Code, Time Zone, UTC and the local Honolulu County FIPS Code. Each Waipahu Hawaii zip code has a center Longitude / Latitude point (the Waipahu center is -158.01100158691 / 21.386400222778). For your convenience we have also indicated if that zip code in Waipahu observes Daylight Savings time.