District of Columbia’s one representative, called an “at-large” representative because they represent the entire area, is:
District of Columbia
The District of Columbia (DC) is the nation’s capital district. Although DC has a larger population than some states, the District is not one of the fifty states and so has no senators and its representative in the House of Representatives is a delegate with limited voting privileges. Delegates have a marginalized role in Congress and their constituents are not represented in Congress in the same manner as most citizens.