Below is a list of Ouachita County LA zip codes. For your research we have also included Ouachita County Area Code, Time Zone, UTC and the local County FIPS Code. Each Ouachita County Louisiana zip code has a center Longitude / Latitude point (the Ouachita County center is -92.12809753418 / 32.530300140381). For your convenience we have also indicated if that zip code in Ouachita County observes Daylight Savings time.