List of highways numbered 45

International

• Asian Highway 45
• European route E45

Burma

• Road 45 (Burma)">Road 45 (Iran)">Road 45 (Burma)

Canada

• Alberta Highway 45
• Manitoba Highway 45
• Ontario Highway 45
• Saskatchewan Highway 45

China

• G45 Expressway
• Asian Highway 45A

Dominican Republic

• DR-45 straddling the border with Haiti

Finland

• Finnish national road 45

France

• A45 autoroute

Germany

• Bundesautobahn 45

India

• National Highway 45 (India)

Iran

• Road 45

Japan

• Japan [National Route 45]

Korea, South

• Jungbu Naeryuk Expressway
• National Route 45

Mexico

• Mexican Federal Highway 45

New Zealand

• New Zealand State Highway 45

United Kingdom

• British A45 (Birmingham-Thrapston)
• British M45 (Watford Gap-Thurlaston)

United States

• Interstate 45
• U.S. Route 45
• * U.S. Route 45E
• * U.S. Route 45W
• Alabama State Route 45
• * County Route 45
• Arkansas Highway 45
• California State Route 45
• Colorado State Highway 45
• Connecticut Route 45
• Florida State Road 45
• * Florida State Road 45A
• Georgia State Route 45
• * Georgia State Route 45
• Idaho State Highway 45
• Illinois Route 45
• Indiana State Road 45
• Iowa Highway 45
• K-45 (Kansas highway)
• Louisiana Highway 45
• Maryland Route 45
• *Maryland Route 45A
• *Maryland Route 45B
• *Maryland Route 45C
• *Maryland Route 45D
• *Maryland Route 45E
• Massachusetts Route 45
• M-45 (Michigan highway)
• Minnesota State Highway 45
• Missouri Route 45
• Nebraska Highway 45
• * Nebraska Link 45B
• * Nebraska Spur 45A
• Nevada State Route 45
• New Hampshire Route 45
• New Jersey Route 45
• * County Route 45 (Monmouth County, New Jersey)
• New Mexico State Road 45
• New York State Route 45
• * County Route 45 (Cattaraugus County, New York)
• * County Route 45A (Cayuga County, New York)
• **County Route 45B (Cayuga County, New York)
• * County Route 45 (Erie County, New York)
• * County Route 45 (Genesee County, New York)
• * County Route 45 (Greene County, New York)
• * County Route 45 (Herkimer County, New York)
• * County Route 45 (Jefferson County, New York)
• * County Route 45 (Niagara County, New York)
• * County Route 45 (Oswego County, New York)
• * County Route 45 (Otsego County, New York)
• * County Route 45 (Putnam County, New York)
• * County Route 45 (Rensselaer County, New York)
• * County Route 45 (Saratoga County, New York)
• * County Route 45 (St. [Lawrence County, New York)]
• * County Route 45 (Steuben County, New York)
• * County Route 45 (Suffolk County, New York)
• * County Route 45 (Sullivan County, New York)
• ** County Route 45A (Sullivan County, New York)
• * County Route 45 (Ulster County, New York)
• * County Route 45 (Washington County, New York)
• North Carolina Highway 45
• North Dakota Highway 45
• Ohio State Route 45
• Oklahoma State Highway 45
• Pennsylvania Route 45
• South Carolina Highway 45
• South Dakota Highway 45
• Tennessee State Route 45
• Texas State Highway 45
• * Texas State Highway Spur 45
• * Farm to Market Road 45
• * Texas Park Road 45
• Utah State Route 45
• Virginia State Route 45
• West Virginia Route 45
• Wisconsin Highway 45