Below is a list of District Of Columbia County DC zip codes. For your research we have also included District Of Columbia County Area Code, Time Zone, UTC and the local County FIPS Code. Each District Of Columbia County District Of Columbia zip code has a center Longitude / Latitude point (the District Of Columbia County center is -76.76180267334 / 38.764701843262). For your convenience we have also indicated if that zip code in District Of Columbia County observes Daylight Savings time.