Arusha Region:

     Arusha District

1st April, 1955

Coast Region:

    Dar es Salaam District

6th October, 1950

     Kisarawe District

{mprestriction ids="1,2,3"}

6th October, 1950

Kilimanjaro Region:

    Kilimanjaro District

1st April, 1955

Morogoro Region:

    Morogoro District

17th Sept, 1954

Mwanza Region:

    Mwanza District

27th June, 1958

Tabora Region:

    Tabora District

17th April, 1961

Tanga Region:

    Tanga District

8th May, 1951

Iringa Region:

    Iringa District

15th Nov, 1963

    Bukoba district

1st July, 1964

    Dodoma District

1st July, 1965

    Mbeya District

1st August, 1965

    Lindi District

1st January, 1966

    Musoma District

1st January, 1967

    Shinyanga District

1st January, 1967

    Singida District

20th May, 1968

    Songea and Kigoma Districts

1st Sept, 1969

    Mtwara District

1st October, 1970

    Lushoto, Mbulu, Njombe, Sumbawanga and Tarime Districts

1st January, 1974

    Tunduru District

1st July, 1982