This is a list of members of the South Australian Legislative Council from 1918 to 1921.
| Name | District | Party | Term expiry | Time in office |
|---|---|---|---|---|
| John George Bice | Northern | Liberal Union | 1921 | 1894–1923 |
| Joseph Botterill [2] | Southern | Liberal Union | 1921 | 1915–1920 |
| John Carr | Central No. 1 | Labor | 1921 | 1915–1929 |
| John Herbert Cooke | Central No. 2 | Liberal Union | 1921 | 1915–1933 |
| John Cowan | Southern | Liberal Union | 1924 | 1910–1944 |
| Walter Gordon Duncan | Midland | Liberal Union | 1924 | 1918–1962 |
| Tom Gluyas | Central No. 1 | Labor | 1924 | 1918–1931 |
| David Gordon | Midland | Liberal Union | 1924 | 1913–1944 |
| Walter Hannaford | Midland | Liberal Union | 1921 | 1912–1941 |
| William Humphrey Harvey | Central No. 2 | National Party | 1924 | 1915–1935 |
| James Jelley | Central No. 1 | Labor | 1921 | 1912–1933 |
| Andrew Kirkpatrick | Central No. 1 | Labor | 1924 | 1891–1897, 1900–1909, 1918–1928 |
| John Lewis | Northern | Liberal Union | 1921 | 1898–1923 |
| Thomas McCallum [2] | Southern | Liberal Union | 1921 | 1920–1938 |
| William George Mills | Northern | Farmers and Settlers | 1924 | 1918–1933 |
| William Morrow | Northern | Liberal Union | 1924 | 1915–1934 |
| Thomas Pascoe | Midland | Liberal Union | 1921 | 1900–1933 |
| Sir Lancelot Stirling | Southern | Liberal Union | 1924 | 1891–1932 |
| Henry Tassie | Central No. 2 | Liberal Union | 1924 | 1918–1938 |
| Alfred von Doussa | Southern | Liberal Union/Independent [3] | 1921 | 1901–1921 |
| Frederick Samuel Wallis | Central No. 2 | Labor/Independent [1] | 1921 | 1907–1921 |
