The short two letter district of columbia abbrevation is DC. District of columbia is not among the 50 us states but is very important as being a capital of united states aslo a federal district located on the potomac river and covers 270 zip codes which include 3 cities and 1 county. The complete details are given below

NameDistrict of Columbia
CountryUnited States
AbbreviationDC
NicknameFederal district