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

Helsinki Finland 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 Helsinki Finland Temple District listed in order of creation.
The Helsinki Finland Temple serves members from 2 stakes and 19 districts based in Estonia, Finland, Lithuania, and Russia:

Pietarsaari Finland DistrictNovember 1, 1970
Oulu Finland DistrictFebruary 7, 1971
Helsinki Finland StakeOctober 16, 1977
Tampere Finland StakeApril 17, 1983
Moscow Russia DistrictFebruary 21, 1993
St. Petersburg Russia DistrictSeptember 19, 1993
Samara Russia DistrictJune 23, 1996
Saratov Russia DistrictAugust 13, 1996
Rostov Russia DistrictMay 18, 1997
Novosibirsk Russia DistrictDecember 1, 1997
Tallinn Estonia DistrictDecember 21, 1997
Vilnius Lithuania DistrictJanuary 18, 1998
Yekaterinburg Russia DistrictMarch 29, 1999
Ufa Russia DistrictDecember 5, 1999
Chelyabinsk Russia DistrictJuly 30, 2000
Perm Russia DistrictOctober 6, 2000
Krasnoyarsk Russia DistrictApril 25, 2001
Omsk Russia DistrictApril 25, 2001
Volgograd Russia DistrictDecember 1, 2002
Togliatti Russia DistrictJune 28, 2004
Moscow Russia West DistrictJuly 2, 2006
Helsinki Finland TempleDedicated October 22, 2006