Steeles Avenue

Steeles Avenue
; ;
Halton Regional Road 8; Peel Regional Road 15; York Regional Road 95 (unsigned)
	Route of Steeles Avenue in the Greater Toronto Area (GTA), Highlighted in a blue line.
Namesake	Thomas Steele
Maintained by	City of Toronto; Region of Peel; Region of Halton
Length	77.5 km (48.2 mi)
Location	Pickering; Toronto; Vaughan; Markham; Brampton; Milton; Halton Hills
West end	Appleby Line ; in Milton
Major; junctions	(Former) Highway 25 (Martin Street); Trafalgar Road; Winston Churchill Boulevard; Mississauga Road ; Hurontario Street / Main Street; Highway 410 ; Airport Road; (Former) Highway 50 / Albion Road; (Former) Highway 27 ; Islington Avenue; Weston Road; Highway 400; Jane Street; Keele Street; Dufferin Street; Bathurst Street; Yonge Street; Bayview Avenue; Don Mills Road / Leslie Street ; Highway 404 / Woodbine Avenue; Warden Avenue; Kennedy Road; McCowan Road; Markham Road
East end	Scarborough-Pickering Townline / ; York-Durham Line ; in Pickering (Continues as Taunton Road)
	Nearby arterial roads

Steeles Avenue is an east–west street that stretches 77.5 km (48.2 mi) across the western and central Greater Toronto Area in Ontario, Canada. Running from Appleby Line in Milton in the west to the Scarborough-Pickering Townline in the east, where it continues east into Durham Region as Taunton Road, which itself extends 58 km (36 mi) across the length of Durham Region to its boundary with Northumberland County. It is most notable for being the north city limit of Toronto where it borders the southern limit of York Region along its eastern half.

York Region refers to Steeles Avenue as York Regional Road 95 but this use is only internal and there are no signs posted; as the street borders and is maintained by the City of Toronto. Through Peel and Halton Regions, the road is signed as Peel Regional Road 15 and Halton Regional road 8, respectively.

The combination of Steeles and Taunton Road is the only arterial road to cross almost the entire Greater Toronto Area without breaks or turnoffs.