The 1927 New South Wales state election to elect the 90 members of the 28th Legislative Assembly was held on 8 October 1927. During the previous parliament the voting system, which had been a form of proportional representation with multi-member seats and a single transferable vote (modified Hare-Clark), was changed to single member constituencies with optional preferential voting. Severe divisions occurred within the Labor Party caucus in the four months prior to the election (see Lang Labor) and a caretaker government composed of the supporters of the Premier of New South Wales and party leader, Jack Lang was in power at the time of the election.