King's Highway 41, commonly referred to as Highway 41, is a provincially maintained highway in the Canadian province of Ontario. The 159.6-kilometre (99.2 mi) highway travels in a predominantly north–south direction across eastern Ontario, from Highway 7 in Kaladar to Highway 148 in Pembroke. The majority of this distance crosses through a rugged forested region known as Mazinaw Country. However, the route enters the agricultural Ottawa Valley near Dacre. A significant portion of Highway 41 follows the historic Addington Colonization Road, built in 1854.

King's Highway 7, commonly referred to as Highway 7 and historically as the Northern Highway, is a provincially maintained highway in the Canadian province of Ontario. At its peak, Highway 7 measured 716 km (445 mi) in length, stretching from Highway 40 east of Sarnia in Southwestern Ontario to Highway 17 west of Ottawa in Eastern Ontario. However, due in part to the construction of Highways 402 and 407, the province transferred the sections of Highway 7 west of London and through the Greater Toronto Area to county and regional jurisdiction. The highway is now 535.7 km (332.9 mi) long; the western segment begins at Highway 4 north of London and extends 154.1 km (95.8 mi) to Georgetown, while the eastern segment begins at Donald Cousens Parkway in Markham and extends 381.6 km (237.1 mi) to Highway 417 in Ottawa.