The following highways are numbered 624:
| Preceded by 623 | Lists of highways 624 | Succeeded by 625 |
King's Highway 101, commonly referred to as Highway 101, is a provincially maintained highway in the Canadian province of Ontario. The 473.3-kilometre (294.1 mi) highway connects Highway 17 west of Wawa with Highway 11 in Matheson before continuing east to the Ontario–Quebec border where it becomes Route 388. The highway forms one of the only connections between the two routes of the Trans-Canada Highway between Nipigon and Temagami, and crosses some of the most remote regions of Northern Ontario. Major junctions are located with Highway 129 near Chapleau and Highway 144 southwest of Timmins, though the distance between these junctions is significant.
Autoroute 20 is a Quebec Autoroute, following the Saint Lawrence River through one of the more densely populated parts of Canada, with its central section forming the main route of the Trans-Canada Highway from the A-25 interchange to the A-85 interchange. At 585 km (363.5 mi), it is the longest Autoroute in Quebec. It is one of two main links between Montreal and Quebec City; the other is the A-40.
Pennsylvania Route 624 is a north–south state route located in southern central Pennsylvania. Its southern terminus is at PA 24 in Red Lion. The northern terminus is at PA 462 in Wrightsville near the Columbia–Wrightsville Bridge that carries PA 462 across the Susquehanna River. PA 624 is a two-lane undivided road that runs through rural areas in eastern York County. The route heads northeast from Red Lion and passes through Windsor before it comes to an intersection with PA 124 and PA 425 in Craley. PA 624 continues northeast before it turns north and follows the western bank of the Susquehanna River to Wrightsville. PA 224 was originally designated in 1928 to run from Red Lion north to U.S. Route 30 in Wrightsville. The route was extended south to PA 24/PA 74 in Red Lion by 1930. In the 1930s, PA 224 was renumbered to PA 624 to avoid confusion with US 224. The south end of PA 624 was moved to its current location in the 1960s following a rerouting of PA 24.
Highway 46 is a provincial highway in the Canadian province of Saskatchewan. It runs from the Ring Road at Regina to Highway 1 and Highway 364 near Balgonie; it is about 22 kilometres (14 mi) long. Highway 46 intersects Highway 362 and Highway 624 and passes through the communities of Pilot Butte and Balgonie; it is known as McDonald Street within Regina city limits.
Maryland Route 624 is a state highway in the U.S. state of Maryland. The state highway runs 3.02 miles (4.86 km) from MD 165 in Pylesville north to State Route 2080 at the Pennsylvania state line a short distance north of its intersection with MD 136 at Graceton. MD 624 was constructed in the mid-1930s.
King's Highway 109, or Highway 109, is a former provincial highway in Ontario. It was used on two separate, unrelated routes during the 1950s and 1960s:
Secondary Highway 500, commonly referred to as Highway 500, was a secondary highway in the Canadian province of Ontario which was first designated in 1956. Its route was renumbered in 1964, becoming:
Secondary Highway 514, commonly referred to as Highway 514, was a secondary highway in the Canadian province of Ontario. It was used on two separate routes from the 1950s to the 1990s:
