Laurence O'Neill was an Irish politician and corn merchant who served as Lord Mayor of Dublin from 1917 to 1924, serving through the Irish War of Independence and the Irish Civil War. He refused an offer to act as Crown Prosecutor after the Easter Rising. During the 1920 Irish hunger strikes, O'Neill actively supported the demands of the 36 hunger strikers in Mountjoy Prison.

The Lord Mayor of Dublin is the honorary title of the chairperson of Dublin City Council which is the local government body for the city of Dublin, the capital of Ireland. The incumbent, since June 2023, is councillor Daithí de Róiste. The office holder is elected annually by the members of the Council.