York Regional Police were called to a condominium building located near Yonge Street and Elgin Mills Road, in the early hours of Saturday morning.
Inside, they found a woman dead and they arrested a man at the scene.
The victim's name is currently under a publication man.
But the accused man appeared in a Newmarket, Ont., court on Sunday.
In court, the man had a cut on his face and bandages on his hands. He appeared extremely nervous. Police would not comment on his wounds.