King's Highway 416, commonly referred to as Highway 416 and as the Veterans Memorial Highway, is a 400-series highway in the Canadian province of Ontario that connects Highway 417 in Ottawa with Highway 401 between Brockville and Cornwall. The 76.4-kilometre-long (47.5 mi) freeway acts as an important trade corridor from Interstate 81 between New York and Eastern Ontario via Highway 401, as well as the fastest link between Ottawa and Toronto. Highway 416 passes through a largely rural area, except near its northern terminus where it enters the suburbs of Ottawa. The freeway also serves several communities along its length, notably Spencerville and Kemptville.

The 400-series highways are a network of controlled-access highways in the Canadian province of Ontario, forming a special subset of the provincial highway system. They are analogous to the Interstate Highway System in the United States or the Autoroute system of neighbouring Quebec, and are regulated by the Ministry of Transportation of Ontario (MTO). The 400-series designations were introduced in 1952, although Ontario had been constructing divided highways for two decades prior. Initially, only Highways 400, 401 and 402 were numbered; other designations followed in the subsequent decades. The network is situated almost entirely in Southern Ontario, although Highway 400 extends into the more remote northern portion of the province.