Koshekhablsky District was created in 1934.
Koshekhablsky District ended in 1963.
Bilibinsky District was created in 1930.
Gornozavodsky District was created in 1965.
Papakura District was created in 1989.
Bakalinsky District was created in 1930.
Enbekshilder District was created in 1932.
Sudbury District was created in 1907.
Khorinsky District was created in 1923.
District Bank was created in 1829.
Sharbakty District was created in 1928.
Kizhinginsky District was created in 1940.
Kokrajhar district was created in 1983.