Hillary Clinton and her entourage are planning an election after-party at the five-star Peninsula Hotel on Fifth Avenue — just a block from Trump Tower, sources told The Post.

One law enforcement said the hotel was selected by Team Clinton to send a message to GOP rival Donald Trump, who is running behind in most polls.

“Out of all of the hotels in Manhattan, she chooses the the Peninsula which is very, very close to Trump Tower,” the source said.

“She wants to stick it up his nose when she wins,” he added.

The official Clinton victory party is a couple miles away at the Jacob K. Javits Convention Center on the Far West Side.

Trump’s party is scheduled at the New York Hilton at 54th Street and Sixth Avenue.

Rooms at the Peninsula start at $695 a night, according to its website. A 1,050-square-foot “deluxe suite” lists for $4,450 a night.

The Clinton campaign declined to comment.