The victim reported they had been sexually assaulted several times between March 1993 and November 2005 and the incidents are to have taken place in the City of Guelph and Wellington County.
As a result of the investigation a 51-year-old of London has been charged with 3 counts of sexual assault.
The accused and the victim were known to each other.
The accused is set to appear before a court in Guelph at a later date.