The 1923 Victorian Police strike occurred in Melbourne, Victoria, Australia. On the eve of the Melbourne Spring Racing Carnival in November 1923, half the police force in Melbourne went on strike over the operation of a supervisory system using labour spies. Riots and looting followed as crowds poured forth from Flinders Street Station on the Friday and Saturday nights and made their way up Elizabeth and Swanston Streets, smashing shop windows, looting, and overturning trams.
The strike started late on Wednesday night 31 October 1923 – the eve of Melbourne's Spring Racing Carnival – when a squad of 29 constables at Russell Street Police Headquarters refused duty, citing the continued use of spies by management. The Victoria Police force at the time were understaffed, lowly paid in comparison with other state police forces, and had no industry pension, with the government continually deferring promises on the introduction of a pension program.
The Police Association had made repeated attempts to improve the pay and conditions of the force, and had made representations over the use of "spooks" as inappropriate for supervision to the Nationalist government of Victoria under the Premier, Harry Lawson. The strike was led by Constable William Thomas Brooks, of the licensing squad, who two years earlier circulated a petition among his fellow officers calling for better conditions. Headed Comrades and Fellow Workers, it was signed by almost 700 men.
The strike was not a Police Association initiative, although the organisation negotiated on behalf of the strikers with the Premier, Harry Lawson. Most of the strikers were constables, many of them returned servicemen. Detectives and senior officers did not participate.