Mormon members belong to stakes, districts, and branches in a temple district, like the Washington D.C. Temple Temple District, which grows as members join the Church

Washington D.C. Temple

Temple District Chronological

Congregations are organized into stakes, districts, and branches, which belong to a temple district. Following are the stakes and districts belonging to the Washington D.C. Temple District listed in order of creation.
The Washington D.C. Temple serves members from 41 stakes and 1 district based in Delaware, District of Columbia, Maryland, New Jersey, Pennsylvania, Virginia, and West Virginia:

Washington D.C. StakeJune 30, 1940
Richmond Virginia StakeJune 30, 1957
Philadelphia Pennsylvania StakeOctober 16, 1960
Oakton Virginia StakeMarch 3, 1963
Virginia Beach StakeApril 12, 1964
Pittsburgh Pennsylvania StakeMay 11, 1969
Roanoke Virginia StakeJanuary 11, 1970
York Pennsylvania StakeApril 19, 1970
Annandale Virginia StakeApril 26, 1970
Silver Spring Maryland StakeSeptember 13, 1970
Washington D.C. TempleDedicated November 19, 1974
Baltimore Maryland StakeDecember 8, 1974
Wilmington Delaware StakeDecember 8, 1974
Centreville Virginia StakeFebruary 1, 1976
Winchester Virginia StakeMay 22, 1977
Newport News Virginia StakeJune 12, 1977
Pembroke Virginia StakeMay 14, 1978
Waynesboro Virginia StakeMay 28, 1978
Altoona Pennsylvania StakeJuly 23, 1978
Pittsburgh Pennsylvania North StakeNovember 26, 1978
Clarksburg West Virginia StakeMay 6, 1979
Scranton Pennsylvania StakeAugust 2, 1979
Harrisburg Pennsylvania StakeAugust 12, 1979
Suitland Maryland StakeAugust 19, 1979
Cherry Hill New Jersey StakeNovember 18, 1979
Fredericksburg Virginia StakeOctober 26, 1980
Brookville Pennsylvania DistrictApril 14, 1981
McLean Virginia StakeFebruary 14, 1982
Reading Pennsylvania StakeOctober 31, 1982
Frederick Maryland StakeDecember 12, 1982
Annapolis Maryland StakeJune 12, 1983
Richmond Virginia Chesterfield StakeOctober 30, 1983
Seneca Maryland StakeOctober 27, 1985
Mount Vernon Virginia StakeJanuary 5, 1986
Chesapeake Virginia StakeJanuary 17, 1988
Columbia Maryland StakeNovember 10, 1991
Ashburn Virginia StakeJanuary 29, 1995
Williamsport Pennsylvania StakeApril 13, 1997
Valley Forge Pennsylvania StakeFebruary 14, 1999
Buena Vista Virginia StakeJune 6, 1999
Martinsburg West Virginia StakeFebruary 29, 2004
Woodbridge Virginia StakeMay 16, 2004
Richmond Virginia Midlothian StakeDecember 4, 2005