Route 15, or Highway 15, can refer to: For roads named A15, see A15 roads.

• AH15 Asian Highway 15
• E15 European route E15
• E015 European route E015

• Hunter Expressway
• New England Highway and other local Newcastle routes (New South Wales)

• Tiger Brennan Drive

• Cunningham Highway (Queensland)
• New England Highway (Queensland)

• – South Australia

• Castra Road

• Alberta Highway 15
• British Columbia Highway 15
• Manitoba Highway 15
• New Brunswick Route 15
• Ontario Highway 15
• Prince Edward Island Route 15
• Quebec Autoroute 15
• Saskatchewan Highway 15

• G15 Expressway
  • G15_w Expressway (G15's branch)

• Artemisa–Cabanas Road (2–15)

• I/15 Highway; Czech: Silnice I/15

• RN-15 (Djibouti)

• EO15 road

• National Highway 15 (India)
• State Highway 15 (Tamil Nadu)
• State Highway 15 (West Bengal)

• Road 15

• N15 road (Ireland)

• Autostrada A15
• RA 15

• Japan National Route 15

• Highway 15

• Seohaean Expressway
• National Route 15
• Gukjido 15

• Mexican Federal Highway 15
• Mexican Federal Highway 15D

• New Zealand State Highway 15

• National Route 15

• National road 15 (Poland) runs northeast from Trzebnica to Ostróda, 395 km^[1]

• Highway M15 (Ukraine)

• British A15 (Norman Cross-Hessle)

• Interstate 15
• U.S. Route 15
• New England Route 15 (former)
• Alabama State Route 15 (former)
• Arkansas Highway 15
• California State Route 15
  • County Route A15 (California)
  • County Route E15 (California)
  • County Route G15 (California)
  • County Route J15 (California)
  • County Route S15 (California)
• Colorado State Highway 15
• Connecticut Route 15
• Delaware Route 15
• Florida State Road 15
  • County Road 15 (Orange County, Florida)
  • County Road 15 (Seminole County, Florida)
• Georgia State Route 15
• Hawaii Route 15 (former)
• Illinois Route 15
• Indiana State Road 15
• Iowa Highway 15
• K-15 (Kansas highway)
• Kentucky Route 15
• Louisiana Highway 15
  • Louisiana State Route 15 (former)
• Maine State Route 15
• Massachusetts Route 15
• M-15 (Michigan highway)
• Minnesota State Highway 15
  • County Road 15 (Hennepin County, Minnesota)
  • County Road 15 (Ramsey County, Minnesota)
  • County Road 15 (Scott County, Minnesota)
  • County Road 15 (Washington County, Minnesota)
• Mississippi Highway 15
• Missouri Route 15
• Nebraska Highway 15
  • Nebraska Recreation Road 15B
  • Nebraska Recreation Road 15C
• Nevada State Route 15 (former)
• New Jersey Route 15
  • County Route 15 (Monmouth County, New Jersey)
• New Mexico State Road 15
• New York State Route 15
  • County Route 15 (Allegany County, New York)
    • County Route 15B (Allegany County, New York)
  • County Route 15 (Cattaraugus County, New York)
  • County Route 15 (Chautauqua County, New York)
  • County Route 15 (Franklin County, New York)
  • County Route 15 (Genesee County, New York)
  • County Route 15 (Hamilton County, New York)
  • County Route 15 (Jefferson County, New York)
  • County Route 15 (Monroe County, New York)
  • County Route 15 (Niagara County, New York)
  • County Route 15 (Oneida County, New York)
  • County Route 15 (Ontario County, New York)
  • County Route 15 (Orange County, New York)
  • County Route 15 (Orleans County, New York)
  • County Route 15 (Oswego County, New York)
  • County Route 15 (Putnam County, New York)
  • County Route 15 (Rensselaer County, New York)
  • County Route 15 (Rockland County, New York)
  • County Route 15 (Schuyler County, New York)
  • County Route 15 (Steuben County, New York)
  • County Route 15 (Suffolk County, New York)
  • County Route 15 (Tioga County, New York)
  • County Route 15 (Ulster County, New York)
  • County Route 15 (Westchester County, New York)
  • County Route 15 (Wyoming County, New York)
  • County Route 15 (Yates County, New York)
• North Carolina Highway 15 (former)
• North Dakota Highway 15
• Ohio State Route 15
• Oklahoma State Highway 15
• Oregon Route 15 (former)
• Pennsylvania Route 15 (former)
• Rhode Island Route 15
• South Dakota Highway 15
  • South Dakota Highway 15Y (former)
• Tennessee State Route 15
• Texas State Highway 15
  • Texas State Highway Loop 15
  • Farm to Market Road 15
  • Texas Park Road 15
• Utah State Route 15 (former)
• Vermont Route 15
• State Route 15 (Virginia 1918-1923) (former)
  • State Route 15 (Virginia 1923-1933) (former)
• Washington State Road 15 (former)
  • Primary State Highway 15 (Washington) (former)
  • Secondary State Highway 15B (Washington) (former)
  • Secondary State Highway 15C (Washington) (former)
  • Secondary State Highway 15D (Washington) (former)
• West Virginia Route 15
• Wisconsin Highway 15

Territories

• Guam Highway 15
• Puerto Rico Highway 15

• Route 15 Javier Barrios Amorín

• M15 road (Zambia)

• List of A15 roads
• List of highways numbered 15A
• List of highways numbered 15E
• List of highways numbered 15W