The special election will be held Feb. 24 to fill the seats of the three former councilmen, all Democrats whose resignations became effective this past week.
In November, Joseph Addabbo and Hiram Monserrate of Queens were elected to the state Senate. And Michael McMahon, who represented the north shore of Staten Island, is replacing Vito Fossella in Congress.
Fossella, the lone Republican representing the city in the House, did not seek reelection following his drunken driving arrest last year and confession that he fathered a child out-of-wedlock.
The elections will be nonpartisan, and the winners will serve through Dec. 31.
The entire City Council - plus the mayor, city controller and public advocate - face election this fall for full terms beginning Jan. 1.