Peel region police say the unidentified 58-year-old woman was pronounced dead at the scene (on Laburnum Crescent).
The victim's 28 year-old son, a Mississauga resident, has been arrested, but police have not yet said if he's been charged.
Police add that an unspecified weapon has been recovered.
The homicide is Peel Region's 14th of the year.
Woman, 58, found dead in Mississauga, Ont., home; son, 28, arrested
MISSISSAUGA, Ont. - The body of a woman showing what police say were “obvious signs of trauma” has been found at a residence in Mississauga, Ont.