Nily Rozic bested Community Board 11 Chairman Jerry Iannece Thursday night in the race for the 25th Assembly District seat.
Rozic, 26, the former chief of staff to Manhattan Assemblyman Brian Kavanagh, received 56 percent of the vote, the New York Times reported.
Iannece, who previously ran for City Council in 2001 and 2009, took 43 percent of the vote.
Rozic, who could not immediately be reached for a comment, had said her would include health care, campaign finance reform and improvements to local schools.
The 25th Assembly seat became vacant earlier this year after Rory Lancman, D-Fresh Meadows, decided to run for the Sixth Congressional Seat after U.S. Rep. Gary Ackerman, D-Bayside, announced that he would retire. He was defeated in the Democratic primary for that seat by Assemblywoman Grace Meng, D-Flushing.
The 25th Assembly seat covers Bayside Hills, Douglaston, Oakland Gardens, Auburndale, Fresh Meadows, Hillcrest, Queensborough Hill and a sliver of Bayside.