List of highways numbered 345

Australia

Canada

• Manitoba [Provincial Road 345]
• New Brunswick Route 345
• Newfoundland and Labrador Route 345
• Prince [Edward Island Route 345]
• Quebec Route 345

  Japan

• Japan [National Route 345]

  Nigeria

• A345 highway (Nigeria)

  United Kingdom

• A345 road, Marlborough, Wiltshire to Salisbury, Wiltshire

  United States

• Interstate 345
• Arkansas Highway 345
• Florida:
• * Florida [State Road 345]
• * County Road 345 (Levy County, Florida)
• New York [State Route 345]
• North Carolina Highway 345
• Ohio State Route 345
• Pennsylvania Route 345
• Puerto Rico Highway 345
• Texas:
• * Texas [State Highway 345]
• * Texas State Highway Loop 345
• Virginia State Route 345
• * Virginia State Route 345
• Wyoming Highway 345