1973 Semaphore state by-election

The 1973 Semaphore state by-election was a by-election held on 2 June 1973 for the South Australian House of Assembly seat of Semaphore. This was triggered by the death of state Labor MHA Reg Hurst. The seat had been retained by Labor since it was created and first contested at the 1970 state election.

Results
The Socialist Party, who contested the previous election on 3.7 percent of the vote, did not contest the by-election. Labor easily retained the seat.