Her announced and likely Democratic opponents include former City Councilman Sal Albanese; Public Advocate Bill de Blasio; Comptroller John Liu; and former Comptroller Bill Thompson.
Republican contenders include former Metropolitan Transportation Authority Chairman Joseph Lhota; Tom Allon, a publisher; billionaire businessman John Catsimatidis; and George McDonald, the head of a nonprofit that helps the homeless.
Former Bronx borough president and federal housing official Adolfo Carrion, a former Democrat who is now unaffiliated, is running on the Independence Party line and seeking Republican backing.
Associated Press writer Verena Dobnik contributed to this report. Follow Jennifer Peltz at http://twitter.com/jennpeltz