The 1929 New York City mayoral election was held on November 5 in concert with other municipal elections. Democratic incumbent Jimmy Walker defeated Republican challenger Fiorello H. La Guardia in what was considered "a Crushing Defeat to [the] City G.O.P. [delivered]" by Tammany Hall.[1] Socialist candidate Norman Thomas also ran, as did Socialist Labor candidate Olive M. Johnson and former Police Commissioner Richard Edward Enright for the Square Deal Party.
Walker won with a plurality of 497,165 votes, which had been the largest ever recorded for a mayoral candidate up to that time,[1] and won the absolute majority of votes in all five boroughs. The results were part of a larger Democratic landslide in which Democrats won the position of President of the Board of Aldermen, Comptroller, all positions in Brooklyn, and all Borough Presidencies except Queens, and gained 2 seats in the Assembly and 3 in the Board of Aldermen from Republicans.[1] Thomas's results were the highest recorded by the Socialist party to that date.[1]