A jury returned their verdict after two days of deliberation. Banton won a Grammy last week for best reggae album for his work entitled, "Before the Dawn."
He was found guilty of three of four charges, and his attorney said he's facing at least 15 years in prison.
Banton, 37, whose given name is Mark Myrie, is wildly popular in his native Jamaica, and his trial was packed with supporters that included other well-known reggae artists.
Banton's attorney said he plans to appeal the conviction and will file a motion to try to get the singer out of jail on bond in the meantime.
The Associated Press contributed to this report.