The Eastern Diocese of the Episcopal Church in the United States of America combined the territories of the states of Massachusetts

Massachusetts

The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...

 (including Maine

Maine

Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

), Rhode Island

Rhode Island

The state of Rhode Island and Providence Plantations, more commonly referred to as Rhode Island , is a state in the New England region of the United States. It is the smallest U.S. state by area...

, New Hampshire

New Hampshire

New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...

, and Vermont

Vermont

Vermont is a state in the New England region of the northeastern United States of America. The state ranks 43rd in land area, , and 45th in total area. Its population according to the 2010 census, 630,337, is the second smallest in the country, larger only than Wyoming. It is the only New England...

 under the supervision of a single bishop. It was organized in 1811 at a convention called under the influence of the church in Massachusetts. The first bishop of the diocese was Alexander Viets Griswold

Alexander Viets Griswold

Alexander Viets Griswold was the Episcopal Bishop of the Eastern Diocese, which included all of New England with the exception of the Episcopal Diocese of Connecticut....

.

Vermont

Episcopal Diocese of Vermont

The Episcopal Diocese of Vermont is the diocese of the Episcopal Church in the United States of America in the state of Vermont. It was the first diocese in the Episcopal Church to elect a woman, Mary Adelia McLeod, as diocesan bishop....

 elected its own bishop in 1832, and separated from the Eastern Diocese. New Hampshire

Episcopal Diocese of New Hampshire

The Episcopal Diocese of New Hampshire, a diocese of the Episcopal Church in the United States of America , covers the entire state of New Hampshire. It was originally part of the Diocese of Massachusetts, but became independent in 1841. The see city is Concord...

 also separated in 1832. The Eastern Diocese ceased to exist in 1843, when Rhode Island

Episcopal Diocese of Rhode Island

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

 and Maine

Episcopal Diocese of Maine

The Episcopal Diocese of Maine is a diocese of the Episcopal Church in the United States of America and encompasses the entire State of Maine. It is part of the Province of New England - Province I of the ECUSA...

also elected bishops, following the death of Bishop Griswold.