Mormon members belong to stakes, districts, and branches in a temple district, like the Toronto Ontario Temple Temple District, which grows as members join the Church

Toronto Ontario 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 Toronto Ontario Temple District listed in order of creation.
The Toronto Ontario Temple serves members from 8 stakes and 1 district based in Ontario:

Toronto Ontario StakeAugust 14, 1960
Hamilton Ontario StakeSeptember 6, 1970
London Ontario StakeApril 11, 1976
Oshawa Ontario StakeJune 13, 1976
Brampton Ontario StakeJanuary 11, 1981
Kitchener Ontario StakeJune 22, 1986
Toronto Ontario TempleDedicated August 25, 1990
Mississauga Ontario StakeOctober 18, 1992
Sudbury Ontario StakeMay 5, 1996
Kingston Ontario DistrictJune 10, 1996