The towering 18-year-old was flanked by Secret Service agents as he stepped onto the downtown Manhattan campus with a black Swiss Gear backpack casually slung over his shoulder.

Dressed in a white polo, black pants and Adidas Gazelle sneakers, Barron’s first stop was the dean’s office before being whisked off to classes, sources told The Post.

It wasn’t immediately clear what classes the teen plans to take.

Barron’s pick of schools has, until now, been shrouded in secrecy.

His dad exclusively revealed to The Post last month that his 6-foot-7 son would be attending a university in New York this fall but stopped short of revealing the name of the college.

The 45th president added that the teen — who is the only child he shares with wife Melania — had been accepted into multiple schools.

“He’s always been a very good student, he’s smart,” Trump said at the time.

The ex-commander-in-chief has also previously said his son has already taken an interest in politics — and even sometimes advises him on what to do.

Barron graduated from the elite Oxbridge Academy in West Palm Beach, Fla. back in May.

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