The Passaic County Prosecutor's Office said 49-year-old Pedro Quezada, of Wayne, allegedly assaulted a girl from the time she was 11 years old until she was 14.
He's facing charges of first- and second-degree sexual assault, as well as endangering the welfare of a child.
Investigators said there do not appear to be other victims.
Quezada won the $338 million Powerball jackpot in 2013. Here's a photo from when he was announced as the winner:
If convicted, he could spend more than 20 years in prison.