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

Nauvoo Illinois Temple

Temple District Chronological

Congregations are organized into stakes, districts, and branches, which belong to a temple district. Following are the stakes belonging to the Nauvoo Illinois Temple District listed in order of creation.
The Nauvoo Illinois Temple serves members from 5 stakes based in Illinois and Iowa:

Cedar Rapids Iowa StakeMay 29, 1966
Davenport Iowa StakeApril 9, 1978
Nauvoo Illinois StakeFebruary 18, 1979
Peoria Illinois StakeAugust 3, 1980
Iowa City Iowa StakeJune 10, 2001
Nauvoo Illinois TempleDedicated June 27, 2002