Nobleton is an unincorporated community in southwestern King, Ontario, Canada. It is the third-largest community in the township, after King City and Schomberg. Located south of the Oak Ridges Moraine, Nobleton is surrounded by hills and forests. Many horse farms are found on Nobleton's eastern periphery. It is located between King City and Bolton along King Road, and directly north of Kleinburg along Highway 27. To the northwest is Hammertown.