For the first four congresses of that decade (the 13th through 16th Congresses, lasting from 1813 through 1821), Vermont's six members of the House were elected at-large. For the 17th and final Congress of that apportionment (lasting from 1821 through 1823), Vermont elected its representatives from geographical districts. After the 1820 United States census, Vermont lost one seat and went back to at-large members.