The following highways are numbered 11C:
New Hampshire Route 11 is a 108.223-mile-long (174.168 km) east–west state highway in New Hampshire, running completely across the central part of the state. Its western terminus is at the Vermont state line in Charlestown, where it continues west as Vermont Route 11. The eastern terminus is at the Maine state line in Rochester, where it crosses the border with U.S. Route 202 and continues as Maine State Route 11.
State Route 23 (SR 23) is a state highway traversing Whitman and Lincoln counties in the U.S. state of Washington. The 66-mile (106.22 km) highway extends northwest from U.S. Route 195 (US 195) in Steptoe through Sprague to an intersection with SR 28 in Harrington. It serves as a route from Interstate 90 and US 395 in Sprague towards Pullman via US 195, and has a longer child route, SR 231 that travels north from SR 23 near Sprague to Reardan and Chewelah.
U.S. Route 11 (US 11) is a part of the United States Numbered Highway System that runs from New Orleans, Louisiana, to the Canada–United States border at Rouses Point, New York. In the state of New York, US 11 extends for 318.66 miles (512.83 km) from the Pennsylvania state line south of the Southern Tier city of Binghamton to the Canada–United States border at the North Country village of Rouses Point, where it becomes Route 223 upon entering Quebec. The portion of US 11 south of Watertown follows a mostly north–south alignment and is paralleled by Interstate 81 (I-81) while the part of the route north of Watertown follows a more east–west routing, parallel to but not directly on the St. Lawrence River.
New York State Route 11C (NY 11C) is a short state highway located in St. Lawrence County in the northern part of New York in the United States. NY 11C is a northern alternate route of U.S. Route 11 (US 11) between the towns of Stockholm and Lawrence that serves the hamlets of Winthrop and Brasher Falls. NY 11C briefly overlaps with NY 420 in Winthrop. Although NY 11C follows a mostly east–west routing, it was signed as a north–south route until the 2010s.
New York State Route 420 (NY 420) is a north–south state highway in St. Lawrence County, New York, in the United States. The southern terminus of the route is at an intersection with U.S. Route 11 (US 11) in the town of Stockholm. Its northern terminus is at a junction with NY 37 in the village of Massena. NY 420 passes through undeveloped regions of St. Lawrence County for most of its routing and briefly overlaps with NY 11C in the hamlet of Winthrop.
There were two secondary state highways in Washington numbered 11C:
11C, 11-C or 11.C may refer to:
NH 11C may refer to:
