Virginia State Route 174 (SR 174) is a primary state highway in the U.S. state of Virginia. The state highway runs 5.58 miles (8.98 km) from U.S. Route 220 Business (US 220 Business) in Collinsville east to SR 457 in Martinsville. SR 174 is a C-shaped route between the de facto county seat of Henry County, Collinsville, and the nominal county seat and independent city of Martinsville.