An off-duty Border Patrol agent was shot in the face after being robbed by a moped-riding illegal immigrant in a New York City park — but he shot back and wounded his attacker, according to sources.

The 42-year-old off-duty agent and a female companion were sitting on a rock along the Hudson River in Fort Washington Park in Manhattan when they were approached by the two men on a moped around 11:50 p.m., according to police sources.

After a brief exchange and tussle, one of the moped-riding men fired a gun and hit the victim in the face and left forearm.

The federal agent is undergoing surgery and is expected to survive.

The man then drew his own pistol and fired multiple shots at the preps, according to the NYPD.

One suspect, a 21-year-old Dominican national who has been in the country illegally since 2023, was struck and wounded three times by the return gunfire, sources said.

He is currently in custody after walking into a Bronx hospital.

The second suspect is not yet in custody.

An investigation is ongoing.