The shooting occurred at 8:57 p.m. at 239 E. Hanover and North Stockton streets.
Trenton patrol officers arrived and found multiple shell casings in the area, a police spokesman said.
While officers were on scene, they were notified of a gunshot victim arriving at Capital Health Reginal Medical Center by a private vehicle, police said.
The shooting victim was identified as Quymaire Kelly.
Kelly was treated for a non-life-threatening gunshot wound, police said.
The investigation is ongoing and is being conducted by Detective Nicholas Hogan and the Mercer County Shooting Response Team.
CHECK BACK FOR UPDATES
Click here to follow Daily Voice Hamilton Township and receive free news updates.