Below is a list of Onalaska TX zip codes. For your research we have also included Onalaska Area Code, Time Zone, UTC and the local Polk County FIPS Code. Each Onalaska Texas zip code has a center Longitude / Latitude point (the Onalaska center is -95.103996276855 / 30.808399200439). For your convenience we have also indicated if that zip code in Onalaska observes Daylight Savings time.