List of highways numbered 521

The following highways are numbered 521:

Canada

• File:Alberta Highway 521.svg Alberta Highway 521

Cuba

• File:1–521 Cuba.png Candelaria–San Diego de Nunez Road (1–521)

United States

• File:US 521.svg U.S. Route 521
• File:MD Route 521.svg Maryland Route 521
• File:County 521.svg County Route 521 (New Jersey)
• File:OH-521.svg Ohio State Route 521
• File:Ellipse sign 521.svg Puerto Rico Highway 521
• File:SC-521.svg South Carolina Highway 521

Preceded by 520

Lists of highways 521

Succeeded by 522