The following highways are numbered 712:
| Preceded by 711 | Lists of highways 712 | Succeeded by 713 |
Pennsylvania Route 512 is a 26.1-mile-long (42.0 km) state route in Northampton County in the Lehigh Valley region in eastern Pennsylvania. The southern terminus is at U.S. Route 22 north of Bethlehem in Hanover Township. The northern terminus is at PA 611 in Upper Mount Bethel Township. The route heads north from US 22 to Bath, where it intersects PA 248. From here, PA 512 continues northeast and intersects PA 946 in Moorestown before it reaches an interchange with the PA 33 freeway in Wind Gap. The route heads east through the northern Northampton County boroughs of Wind Gap, Pen Argyl, Bangor, and East Bangor, intersecting PA 191 in Bangor. It then continues east to PA 611.
Maryland Route 712 is a state highway in the U.S. state of Maryland. Known as Forest Park Road, the state highway runs 1.11 miles (1.79 km) from MD 235 north to an entrance to Naval Air Station Patuxent River within Lexington Park in eastern St. Mary's County. MD 712 was constructed in the mid-1940s as a military access project.
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:
