List of highways numbered 4

• AH4 Asian Highway 4
• E04 European route E04
• E004 European route E004
• Cairo, Cape Town Highway

• SH-4 road in Albania from Durrës to Kakavijë passing through Lushnjë, Fier, Ballsh, Tepelenë and Gjirokastër.

New South Wales

• M4 Western Motorway (Sydney)
• Western Distributor (Sydney)

Northern Territory

• Lasseter Highway, NT
• • Tjukaruru Road
  • Great Central Road

Queensland

• Port of Brisbane Motorway
• Capricorn Highway
• Scenic Highway, Queensland

Tasmania

• Esk Highway, Tasmania

Victoria

• West Gate Tunnel Motorway (Melbourne)

Western Australia

• State Route 4 (Western Australia), Tonkin Highway

• A4 motorway (Bulgaria)
• I-4 road (Bulgaria)

• Alberta Highway 4
• British Columbia Highway 4
• Manitoba Highway 4
• New Brunswick Route 4
• Northwest Territories Highway 4 (Ingraham Trail)
• Nova Scotia Trunk 4
• Ontario Highway 4
• Route 4 (Prince Edward Island)
• Quebec Route 4 (former)
• Saskatchewan Highway 4
• Yukon Highway 4

• G4 Expressway
  • G4_w Expressway (G4's branch)

• Finnish national road 4
• Åland Islands Highway 4

• M4 motorway (Hungary)
• Main road 4 (Hungary)

• National Highway 4 (India)
• National Highway 4 (India, old numbering)

• M4 motorway (Republic of Ireland)
• N4 road (Ireland)

• National Route 4
• Tōhoku Expressway
  • Aomori Expressway (branch of the Tōhoku Expressway)
  • Daini-Michinoku Toll Road (branch of the Tōhoku Expressway)
  • Hachinohe Expressway (branch of the Tōhoku Expressway)
  • Kamikita Expressway (branch of the Tōhoku Expressway)
  • Michinoku Toll Road (branch of the Tōhoku Expressway)
  • Momoishi Toll Road (branch of the Tōhoku Expressway)
• Route 4 (Shuto Expressway)
• Route 4 (Nagoya Expressway)
• Bayshore Route (Port of Osaka-Kansai International Airport)

• FT 4 Malaysia Federal Route 4
• A4 Jalan Kerian
• B4 Jalan Haji Sirat
• J4 Johor State Route J4

• C-4 Circumferential Road 4
• R-4 Radial Road 4
• N4 highway (Philippines)
• E4 expressway (Philippines)

• Motorway A4
• National road 4 (according to the official documents, national road 4 and motorway A4 are basically the same route)

• M4 (Port Elizabeth)
• M4 road (Pretoria)
• M4 (Durban)
• N4 (South Africa)

• National Highway 4 (Taiwan)
• Provincial Highway 4 (Taiwan)

• O-4, a motorway in Turkey running from Istanbul to Ankara.

• M4 motorway (Great Britain)
• A4 road (Great Britain)
• A4 road (Northern Ireland)

• Interstate 4
• Interstate A-4 (Alaska; unsigned)
• Interstate H-4 (former proposal)
• U.S. Route 4
• New England Interstate Route 4 (former)
• Alabama State Route 4 (former)
  • County Route 4 (Lee County, Alabama)
• Alaska Route 4
• Arkansas Highway 4
• California State Route 4
  • County Route D4 (California)
  • County Route E4 (California)
  • County Route G4 (California)
  • County Route J4 (California)
  • County Route N4 (California)
  • County Route S4 (California)
• Connecticut Route 4
• Delaware Route 4
• Florida State Road 4
  • County Road 4 (Escambia County, Florida)
  • County Road 4 (Okaloosa County, Florida)
    • County Road 4B (Okaloosa County, Florida)
• Georgia State Route 4
  • Georgia State Route 4 (former)
• Idaho State Highway 4
• Illinois Route 4
• Indiana State Road 4
• Iowa Highway 4
• K-4 (Kansas highway)
• Kentucky Route 4
• Louisiana Highway 4
• Maine State Route 4
• Maryland Route 4
• Massachusetts Route 4
• M-4 (Michigan highway) (former)
• Minnesota State Highway 4
  • County Road 4 (Dakota County, Minnesota)
  • County Road 4 (Goodhue County, Minnesota)
  • County Road 4 (St. Louis County, Minnesota)
• Mississippi Highway 4
• Missouri Route 4 (former)
• Nebraska Highway 4
• Nevada State Route 4 (former)
• New Hampshire Route 4
• New Jersey Route 4
  • New Jersey Route 4N (former)
  • County Route 4 (Monmouth County, New Jersey)
• New Mexico State Road 4
• New York State Route 4 (1924-1927) (former)
  • County Route 4 (Broome County, New York)
  • County Route 4 (Cattaraugus County, New York)
  • County Route 4 (Chautauqua County, New York)
  • County Route 4 (Chemung County, New York)
  • County Route 4 (Chenango County, New York)
  • County Route 4 (Clinton County, New York)
  • County Route 4 (Columbia County, New York)
  • County Route 4 (Dutchess County, New York)
  • County Route 4 (Erie County, New York)
  • County Route 4 (Franklin County, New York)
  • County Route 4 (Genesee County, New York)
  • County Route 4 (Jefferson County, New York)
  • County Route 4 (Nassau County, New York)
  • County Route 4 (Oswego County, New York)
  • County Route 4 (Otsego County, New York)
  • County Route 4 (Rensselaer County, New York)
  • County Route 4 (Rockland County, New York)
  • County Route 4 (Saratoga County, New York)
  • County Route 4 (Steuben County, New York)
  • County Route 4 (Suffolk County, New York)
  • County Route 4 (Tioga County, New York)
  • County Route 4 (Ulster County, New York)
  • County Route 4 (Warren County, New York)
  • County Route 4 (Wyoming County, New York)
• North Carolina Highway 4
  • Charlotte Route 4
• North Dakota Highway 4
• Ohio State Route 4
• Oklahoma State Highway 4
• Pennsylvania Route 4 (former)
• Rhode Island Route 4
• South Carolina Highway 4
• Tennessee State Route 4
• Texas State Highway 4
  • Texas State Highway Loop 4 (former)
  • Texas Farm to Market Road 4
  • Texas Park Road 4
  • Texas Recreational Road 4
• Either of two prior designations for highways in Utah
  • Utah State Route 4 (1962-1977), the former designation for Interstate 70 in Utah
  • Utah State Route 4 (1910-1962), the state designation for several sections of multiple U.S. Highways in the northern part of the state
• Vermont Route 4A
• Virginia State Route 4
• Washington State Route 4
  • Primary State Highway 4 (Washington) (former)
• West Virginia Route 4

Territories

• Guam Highway 4
• Puerto Rico Highway 4 (former)

• Hanoi-Haiphong Expressway
• National Route 4 (Vietnam)