| Election Name: | 1917 New York City mayoral election |
| Country: | New York City |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | New York City mayoral elections#1897 to 1913 |
| Previous Year: | 1913 |
| Next Election: | 1921 New York City mayoral election |
| Next Year: | 1921 |
| Election Date: | November 6, 1917 |
| Candidate1: | John F. Hylan |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 314,010 |
| Percentage1: | 46.78% |
| Candidate2: | John P. Mitchel |
| Party2: | Independent (politician) |
| Popular Vote2: | 155,497 |
| Percentage2: | 23.16% |
| Candidate4: | Morris Hillquit |
| Party4: | Socialist Party of America |
| Popular Vote4: | 145,332 |
| Percentage4: | 21.65% |
| Candidate5: | William M. Bennett |
| Party5: | Republican Party (United States) |
| Popular Vote5: | 56,438 |
| Percentage5: | 8.4% |
| Map Size: | 300px |
| Mayor | |
| Before Election: | John P. Mitchel |
| Before Party: | Independent (politician) |
| After Election: | John F. Hylan |
| After Party: | Democratic Party (United States) |
The 1917 New York City mayoral election was held on November 6, 1917. Incumbent mayor John P. Mitchel, a reform Democrat running on the Fusion Party ticket, was defeated for re-election by Judge John Francis Hylan, supported by Tammany Hall and William Randolph Hearst.
The election was notable not only for the first partisan primary elections for City offices, but for the contentious debate over supporting U.S. entry into World War I, vigorously supported by Mitchel and opposed by the Socialist candidate, Morris Hillquit. Mitchel and Hillquit each won about a fifth of the total vote, while Hylan won office with less than half the vote.
The Fall 1917 election, which The New York Times called a "puzzle without parallel",[1] would have been exciting even had it occurred in peacetime. In September, the City held its first-ever primary elections for mayor. Incumbent Fusion Mayor John Purroy Mitchel (an insurgent Democrat) who had enjoyed Republican non-opposition in 1913, apparently won the Republican primary until a series of counting mistakes and frauds (followed by criminal indictments) forced recounts that gave a narrow victory to William M. Bennett. Attempts to find a compromise anti-Tammany candidate failed, Bennett declined to withdraw from the race, and Mitchel went on to wage an independent campaign for re-election.
But the mayoral election happened in the same year as the United States' entry into World War One on April 6. An emergency national convention and referendum of the Socialist Party of America overwhelmingly approved a resolution, co-authored by Morris Hillquit (the Party's candidate for Mayor of New York), which proclaimed,
The Socialist Party of the United States in the present grave crisis solemnly reaffirms its allegiance to the principle of internationalism and working-class solidarity the world over, and proclaims its unalterable opposition to the war just declared by the Government of the United States.[2]
Hillquit's refusal to support the war by such acts as buying Liberty Bonds[3] won the Socialists new support in many immigrant communities,[4] but vitriolic denunciations from many quarters, including The New York Times, Mayor Mitchel, who hinted at Hillquit's foreign birth by saying that "any man who will not buy a Liberty bond when he can afford them is not fit to be a citizen of the United States",[5] and ex-President Theodore Roosevelt (the Republicans' 1886 candidate for mayor), who declared that Hillquit "stands as an aid to the Prussianized autocracy of the Hohenzollerns."[6]
The Fusion campaign decided to direct its last week against Hillquit (who would eclipse Mitchel in The Bronx while matching his vote in Queens and Brooklyn), rather than against Judge John F. Hylan, the candidate of Tammany Hall and William Randolph Hearst. (Hearst, the newspaper publisher who was the 1905 Mayoral candidate of the Municipal Ownership League, and Hylan, who had started life operating subway trains, were both strong opponents of the city's private transit companies.) Hylan's position on the war was unclear, but not his sharp victory over all three of his major rivals on November 6 (exactly seven months after the U.S. Declaration of War and one day before the Bolshevik Revolution in Russia). Although a divided opposition let Hylan carry the City and three of her boroughs with less than 50% of the total vote, the numbers (as in 1897) suggest that Tammany Hall might very easily have won a two-candidate race.
Running for president of the board of aldermen (the position from which acting mayors succeeded when elected mayors could not serve) on the same Democratic ticket as Hylan was Al Smith, then Sheriff of New York County (Manhattan), and previously Democratic Leader and Speaker of the New York State Assembly. (Smith had hoped to run for mayor himself, but Tammany Hall leader Charles F. Murphy chose Hylan instead, partly out of deference to Hearst and to John McCooey, the Democratic leader in Brooklyn.) Smith easily defeated the New York City Fire Commissioner, Robert Adamson, who was running for Board President on the Fusion ticket with Mitchel.[7]
Mayor Mitchel ran second to Judge Hylan in every borough but the Bronx, where Hillquit pushed Mitchel into third place. (Hillquit came within 200 votes of doing the same in Queens.) Bennett (the Republican), who came in fourth everywhere else, came third and pushed Hillquit into fourth place (and below 10%) on Staten Island. Hylan (who led everywhere) won pluralities, rather than absolute majorities, in the City as a whole and in Manhattan, the Bronx and Brooklyn, winning a slim overall majority in Queens and a decisive (4–3) majority on Staten Island.
The New York City Socialists won the highest percentage of the Mayoral vote they would ever receive, while electing ten State Assemblymen, seven city Aldermen, and a municipal court judge.
| candidate | party | Manhattan | The Bronx | Brooklyn | Queens | Richmond (Staten Is.) | Total | % | |
| John Francis Hylan | Democratic | 113,728 | 41,546 | 114,487 | 35,399 | 8,850 | 314,010 | 46.8% | |
| 46.4% | 42.9% | 46.5% | 51.7% | 58.3% | |||||
| John Purroy Mitchel | 66,748 | 19,247 | 52,921 | 13,641 | 2,940 | 155,497 | 23.2% | ||
| 27.3% | 19.9% | 21.5% | 19.9% | 19.4% | |||||
| Morris Hillquit | Socialist | 51,176 | 30,374 | 48,880 | 13,477 | 1,425 | 145,332 | 21.7% | |
| 20.9% | 31.4% | 19.9% | 19.7% | 9.4% | |||||
| William M. Bennett | Republican | 13,230 | 5,576 | 29,748 | 5,916 | 1,968 | 56,438 | 8.4% | |
| 5.4% | 5.8% | 12.1% | 8.6% | 13.0% | |||||
| Subtotal | 244,882 | 96,743 | 246,036 | 68,433 | 15,183 | 671,277 | |||
| Socialist Labor | 20,586 | ||||||||
| others | |||||||||
| T O T A L | 691,809 | ||||||||