A former Occupy Wall Street demonstrator from Queens was found dead in Riverside Park early Saturday, surrounded by empty beer cans and prescription bottles, cops said.

Anne Wiswell, 25, of Astoria, was discovered by a dog walker at 6:45 a.m., ­police said.

The Southport, Conn.- raised woman struggled with mental-health issues and was on a leave of absence from Hunter College, said family members.

Wiswell told a Web site in October 2011 that she became involved with Occupy after she had to drop out of the New School when her parents could no longer ­afford the tuition.

“It was this massive realization — oh my gosh, I have to support myself,” she told Marketplace.org. “Welcome to the real world.”

There were no obvious signs of trauma, and the Medical Examiner’s Office will determine the cause of death.