Nobleton (2011 population 3,582) is an unincorporated village 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.
Nobleton is at an elevation of approximately 300 m, just south of the regional peak of the Oak Ridges Moraine.
The Humber River flows in the southwestern part with a conservation area covering the southwest.
The Oak Ridges Moraine is to the north and is covered with pine forests with a few other types of trees and lakes to the north and the northeast including Nobleton Lakes located nearly 2 to 3 km north of Nobleton which include two lakes and a golf club. Forests are almost sporadically situated in the valleys throughout Nobleton including to the east and into the southeastern portion. The farmlands lie to the west, the south and the east and sproadically to the north. The power lines lie to the west and to the east and both link up to central Ontario.