| Election Name: | 1985 New York City mayoral election |
| Country: | New York City |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1981 New York City mayoral election |
| Previous Year: | 1981 |
| Next Election: | 1989 New York City mayoral election |
| Next Year: | 1989 |
| Election Date: | November 5, 1985 |
| Image3: | 3x4.svg |
| Candidate3: | Diane McGrath |
| Party3: | Republican Party (United States) |
| Alliance3: | Conservative |
| Popular Vote3: | 101,668 |
| Percentage3: | 9.1% |
| Candidate2: | Carol Bellamy |
| Party2: | Liberal Party of New York |
| Popular Vote2: | 113,471 |
| Percentage2: | 10.2% |
| Image1: | File:Edward Koch (1988).jpg |
| Candidate1: | Ed Koch |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 868,260 |
| Percentage1: | 78.0% |
| Map Size: | 250px |
| Mayor | |
| Before Election: | Ed Koch |
| Before Party: | Democratic Party (United States) |
| After Election: | Ed Koch |
| After Party: | Democratic Party (United States) |
The New York City mayoral election of 1985 occurred on Tuesday, November 5, 1985, with Democratic incumbent Mayor Ed Koch being re-elected to a third term by a landslide margin.
Koch received an overwhelming 78.02% of the vote citywide. Koch also swept all five boroughs by landslide margins, breaking 70% of the vote in Manhattan and Queens and breaking 80% of the vote in Brooklyn, the Bronx, and Staten Island.[1]
Koch's closest competitor was the Liberal Party nominee, New York City Council President Carol Bellamy, who received 10.20% of the vote. Finishing in a distant third was the Republican nominee, Diane McGrath, who received 9.14% of the vote.
Koch defeated his nearest competitor by a landslide 67.82% Democratic margin of victory and was sworn into his third and final term in January 1986.
Al Vann and Herman Badillo tried to unite the Black and Puerto Rican communities but were thwarted by the Gang of Four, "But in a move that shocked Vann, the so-called “Gang of Four” from Harlem—Charles Rangel, David Dinkins, Basil Paterson and Percy Sutton—broke ranks and put forth their own candidate for mayor, Harlem Assemblyman Herman “Denny” Farrell, a dark horse if ever there was one. They argued that a black group like the Coalition for a Just New York should support a black candidate, not a Puerto Rican. Badillo bitterly withdrew from consideration. Farrell lost badly in the primary."[2]
As of 2022, this is the last time a Democrat won Staten Island in a mayoral election.