List of highways numbered 257

Canada

• Manitoba Provincial Road 257
• Prince Edward Island Route 257
• Quebec Route 257

  Costa Rica

• National Route 257

  Japan

• Japan National Route 257

  United Kingdom

• road

  United States

• Alabama State Route 257
• California State Route 257
• Colorado State Highway 257
• Florida State Road 257
• Georgia State Route 257
• Indiana State Road 257
• K-257
• Kentucky Route 257
• Maryland Route 257
• Minnesota State Highway 257
• Montana Secondary Highway 257
• New York State Route 257
• Ohio State Route 257
• Pennsylvania Route 257
• Tennessee State Route 257
• Texas State Highway 257
• * Texas State Highway Loop 257
• * Farm to Market Road 257
• Utah State Route 257
• Virginia State Route 257