Eleven accusers, nine women and two men, took the stand over the searing six-week trial to describe sexual humiliation and violence at his hands.
After two days of deliberation, the jury found Kelly guilty on all the charges he was facing.
Sentencing is due on 4 May and he could spend the rest of his life behind bars.
The jury found Kelly, whose full name is Robert Sylvester Kelly, was the ringleader of a violent and coercive scheme that lured women and children for him to sexually abuse.
The singer - most famous for the award-winning song I Believe I Can Fly - was also found to have trafficked women between different US states and produced child pornography.