* [[United Kingdom]]
==Các quốc gia sử dụng trước đây==
* The [[Union of South Africa]] between 1910 and 1961, và [[History of South Africa in the apartheid era|Cộng hoà Nam Phi]] between 1961 and 1984. The 1983 constitution abolished hệ thống Westminster in Nam Phi.
* [[Rhodesia]] between 1965 and 1979, and [[Zimbabwe]] between 1980 and 1987. The 1987 constitution abolished the Westminster system.
* [[Nigeria]] following the end of British colonial rule in 1960, which resulted in the appointment of a Governor-General and then a President, [[Nnamdi Azikiwe]]. The system ended after Nigeria became a republic in 1963.
* [[Ceylon]] between 1948 and 1972, and [[Sri Lanka]] from 1972 until 1978 when the constitution was remodelled into a presidential system.
* [[Burma]] following independence in 1948 until the 1962 military coup d'état.
* [[Fiji]] between 1970 and 1987.
* [[Guyana]] between 1966 and 1970. Presidential system established in 1980.
* [[Kenya]] between 1963 and 1964.