The 24-year-old victim had been accosted by his assailant, who was wearing a "Make America Great Again" hat, on a No.4 train on Friday.
The attacker, wearing a red and red t-shirt with the slogan, began verbally abusing the man while on a northbound 4 train, said police. During the dispute, the individual made multiple derogatory statements regarding the victim's ethnicity, the NYPD said.
The suspect punched the Hispanic man in the head several times before pushing him off the platform onto the tracks, cops say.
The suspect then pushed the victim onto the tracks, police said.
A friend of the victim helped him off the tracks, and he was taken to Bellevue Hospital, where he was treated for a cut to his head, authorities said.
The NYPD is seeking public assistance in identifying the suspect.
The alleged assault comes just eight days after a Danish tourist wearing a "Make America Great Again" hat was attacked and robbed of the hat at the same Union Square subway station. Police released a video of the suspect standing on the train platform.
Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).