This is a list of members of the Western Australian Legislative Assembly between the 1953 election and the 1956 election, together known as the 21st Parliament.
| Name | Party | District | Years in office | |
|---|---|---|---|---|
| 1939–1956 | ||||
| 1947–1958 | ||||
| 1953–1961 | ||||
| Liberal | 1947–1971 | |||
| Labor | 1948–1974 | |||
| Liberal | 1945–1975 | |||
| Liberal | 1936–1956 | |||
| Country | 1947–1967 | |||
| Liberal | 1953–1982 | |||
| Labor | 1924–1953 | |||
| Country | 1928–1956 | |||
| Labor | 1943–1973 | |||
| Labor | 1950–1955 | |||
| Labor | 1933–1968 | |||
| Labor | 1953–1965 | |||
| Liberal | 1950–1968 | |||
| Labor | 1939–1968 | |||
| Labor | 1930–1947; 1950–1968 | |||
| Country | 1936–1956 | |||
| Labor | 1943–1957 | |||
| Liberal | 1950–1977 | |||
| Labor | 1953–1986 | |||
| Labor | 1952–1959 | |||
| Labor | 1941–1968 | |||
| Labor | 1953–1959; 1968–1974 | |||
| Labor | 1951–1960 | |||
| Liberal | 1930–1962 | |||
| Liberal | 1950–1974 | |||
| Labor | 1947–1968 | |||
| Labor | 1949–1956 | |||
| Liberal | 1930–1962 | |||
| Labor | 1951–1971 | |||
| Country | 1947–1974 | |||
| Liberal | 1947–1956; 1959–1968 | |||
| Liberal | 1924–1956 | |||
| Labor | 1953–1974 | |||
| Labor | 1932–1962 | |||
| Labor | 1952–1959 | |||
| Liberal | 1951–1965 | |||
| Country | 1944–1947; 1950–1962 | |||
| Country | 1942–1962 | |||
| Labor | 1953–1968 | |||
| Liberal | 1955–1962 | |||
| 1933–1958 | ||||
| Labor | 1950–1974 | |||
| Labor | 1924–1959 | |||
| Labor | 1936–1956 | |||
| Country | 1930–1959 | |||
| Labor | 1933–1977 | |||
| Country | 1935–1962 | |||
| Liberal | 1947–1965 | |||
| Liberal | 1947–1956 |
On 19 March 1953, the Labor member for Kimberley, Aubrey Coverley, died. Labor candidate John Rhatigan won the resulting by-election on 16 May 1953.
On 21 September 1955, the Labor member for Bunbury, Frank Guthrie, died. Liberal candidate George Roberts won the resulting by-election on 29 October 1955.