Washington Dc Zip Code And County. The zip code prefixes for the district of columbia zip codes are 20, 56 and 88. Zip code 20017 is located in the city of washington, district of columbia and covers 2.222 square miles of land area.
This data is used for the planning and management of washington, d.c. View a list of all washington dc zip codes along with zip code map with an index of 23 different zip codes.