List of highways numbered 318

Canada

• Nova Scotia Route 318
• Prince Edward Island Route 318
• Saskatchewan Highway 318

  China

• China National Highway 318

  Costa Rica

• National Route 318

  Japan

• Japan National Route 318

  United States

• Arkansas Highway 318
• Colorado State Highway 318
• Connecticut Route 318
• Florida:
• * Florida State Road 318
• * County Road 318, several roads in Florida
• Georgia State Route 318
• Indiana State Road 318
• Louisiana Highway 318
• Maryland Route 318
• Minnesota State Highway 318
• Montana Secondary Highway 318
• Nevada State Route 318
• New York:
• * New York State Route 318
• * County Route 318
• Ohio State Route 318
• Pennsylvania Route 318
• Tennessee State Route 318
• Texas:
• * Texas State Highway 318
• * Farm to Market Road 318
• Utah State Route 318
• Virginia State Route 318
• Wyoming Highway 318

• Puerto Rico Highway 318
• U.S. Virgin Islands Highway 318