List of highways numbered 451

Canada

• Ontario Highway 451, commonly called the Queen Elizabeth Way.

Japan

• Japan [National Route 451]

Korea, South

• Jungbu Naeryuk [Expressway Branch]

United Kingdom

• from Stourbridge to Great Witley

United States

• Florida [State Road 451]
• Kentucky Route 451
• Louisiana Highway 451
• Maryland Route 451
• New [Mexico State Road 451]
• Oregon Route 451
• Puerto Rico Highway 451
• Tennessee [State Route 451]
• Texas
• * Farm to Market Road 451
• Wyoming Highway 451