Koch: 70–80% 80–90%
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.
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. As of 2020, this is the most recent mayoral election in which a Democrat carried Staten Island.
|Manhattan||The Bronx||Brooklyn||Queens||Staten Island||Total|
|Democratic - Independent||Edward the first. Koch||171582||137472||248585||248041||62580||868260|
|Republican - Conservative||Diane McGrath||17491||12358||25738||36032||10049||101668|
The Koch vote include 862226 Democratic and 6034 Independent votes. The McGrath vote was 79508 Republican and 22160 Conservative. Other vote was: Yehuda Levin - Right to Life - 14517; Lenora Fulani - New Alliance - 7597;Jarvis Tyner - People Before Profits - 3370; Andrea Gonzalez - Socialist Workers - 1677; Gilbert DiLucia - Coalition - 1135; Marjorie Stanberg - Spartacist - 1101; Scattered - 9
Koch won the Democratic Primary: Koch-436151 64.0%; Bellamy - 127690 18.7%; Denny Farrell - 89845 13.2%; DiLucia - 11, 627 1.7%; Fred Newman - 8584 1.2%; Judah Rubenstein - 8057 1.2%
- "New York City Mayoral Election 1985 inches. Our Campaigns. Retrieved 4 April 2014.