The Episcopal Diocese of Connecticut is a diocese of the Episcopal Church in the United States of America, encompassing the entire state of Connecticut. It is one of the nine original dioceses of the Episcopal Church and one of seven New England dioceses that make up Province 1.

Samuel Seabury was the first American Episcopal bishop, the second Presiding Bishop of the Episcopal Church in the United States of America, and the first Bishop of Connecticut. He was a leading Loyalist in New York City during the American Revolution and a known rival of Alexander Hamilton.