Below is a list of Summit Lake WI zip codes. For your research we have also included Summit Lake Area Code, Time Zone, UTC and the local Langlade County FIPS Code. Each Summit Lake Wisconsin zip code has a center Longitude / Latitude point (the Summit Lake center is -89.197303771973 / 45.376499176025). For your convenience we have also indicated if that zip code in Summit Lake observes Daylight Savings time.