List of highways numbered 3

International

• Asian Highway 3
• European route E03
• European route E003
• Tripoli – Cape Town Highway

  Albania

• A3 motorway (Albania)
• SH-3 Road in Albania from Kapshtice to Tirana.

  Argentina

• National Route 3

  Australia

New South Wales

• A3 (Sydney)

  Northern Territory

• Queensland

• M3/A3 (Brisbane)
• Burnett Highway
• State Route 3 – Isis Highway

  South Australia

• Cross Road

  Tasmania

• Tasman Highway

  Victoria

• *Eastern Freeway (Melbourne)
• *EastLink (Melbourne)
• *Frankston Freeway
• *Nepean Highway

  Western Australia

• State Route 3 – Reid Highway and Roe Highway

  Austria

• Südost Autobahn

  Belgium

• R3 (ring road)

  Bolivia

• National Route 3 (Bolivia)

  Bulgaria

• Републикански път I-3
• Struma motorway (A3/E79)

  Burma

• National Highway 3 (Burma)

  Cambodia

• National Highway 3 (Cambodia)

  Canada

• Alberta Highway 3
• British Columbia Highway 3
• Manitoba Highway 3
• New Brunswick Route 3
• Newfoundland and Labrador Route 3
• Nova Scotia Trunk 3
• Ontario Highway 3
• Prince Edward Island Route 3
• Quebec Route 3
• Saskatchewan Highway 3
• Yellowknife Highway
• Yukon Highway 3

  China

• G3 Expressway

  Costa Rica

• National Route 3

  Cuba

• Autopista A3
• Highway I–3
• * Highway 1–I–3
• * Highway 2–I–3
• * Highway 3–I–3
• * Highway 4–I–3

  Czech Republic

• D3 motorway
• I/3 Highway

  Djibouti

• RN-3 (Djibouti)

  Dominican Republic

• DR-3

  Eswatini

• MR3 road

  Finland

• Finnish national road 3
• Åland Islands Highway 3

  Germany

• Bundesautobahn 3
• Bundesstraße 3

  Greece

• A3 motorway
• EO3 road

  Hong Kong

• Route 3 (Hong Kong)

  Hungary

• M3 motorway (Hungary)
• Main road 3 (Hungary)

  India

• National Highway 3 (India)
• National Highway 3 (India, old numbering)

  Indonesia

• Indonesian National Route 3

  Iran

• Freeway 3 (Iran)

  Iraq

• Highway 3 (Iraq)

  Ireland

• M3 motorway (Republic of Ireland)
• N3 road (Ireland)

  Israel

• Highway 3 (Israel)

  Italy

• Autostrada A3
• RA 3

  Japan

• *
• Route 3 (Shuto Expressway) in the Shibuya area of Tokyo
• Route 3 (Nagoya Expressway)
• Kobe Route

  Kazakhstan

• A3 highway (Kazakhstan)

  Korea, South

• National Route 35

  Laos

• R3A highway

  Malaysia

• Malaysia Federal Route 3

  Mexico

• Mexican Federal Highway 3

  Moldova

• Magistrala 3
• Road 3

  New Zealand

• New Zealand State Highway 3
• * New Zealand State Highway 3A

  Nigeria

• A3 highway (Nigeria)

  Oman

• Route 3 (Oman)

  Paraguay

• [Image:R3-PY.svg|20px|] National Route 3

  Philippines

• Circumferential Road 3
• Radial Road 3
• N3 highway (Philippines)
• E3 expressway (Philippines)

  Poland

• Autostrada A3
• Expressway S3
• National road 3

  Romania

• Drumul Naţional 3
• Autostrada A3

  Russia

• M3 highway (Russia)

  Sri Lanka

• [A3 highway (Sri Lanka)|] Colombo-Puttalam Road
• Colombo–Katunayake Expressway

  South Africa

• N3 (South Africa)
• M3 (Cape Town)
• M3 (Pretoria)

  Taiwan (Republic of China)

• Freeway 3 (Taiwan)
• Provincial Highway 3 (Taiwan)

  Thailand

• Thailand Route 3

  Turkey

• , a motorway in Turkey running from Edirne to Istanbul.

  United Kingdom

• M3 motorway (Great Britain)
• A3 road (Great Britain)
• M3 motorway (Northern Ireland)
• A3 road (Northern Ireland)

  United States

• Interstate 3
• Interstate A-3
• Interstate H-3
• Interstate PR-3
• U.S. Route 3
• New England Interstate Route 3
• Alabama State Route 3
• * County Route 3
• Alaska Route 3
• Arkansas Highway 3
• California State Route 3
• Colorado State Highway 3
• Connecticut Route 3
• Delaware Route 3
• Florida State Road 3
• * Florida State Road 3A (pre-1945)
• * County Road 3 (Brevard County, Florida)
• * County Road 3 (Volusia County, Florida)
• Georgia State Route 3
• * Georgia State Route 3N
• * Georgia State Route 3S (Thomaston)
• * Georgia State Route 3W (Albany 1946–1957)
• * Georgia State Route 3W (Albany 1960–1973)
• * Georgia State Route 3W (Thomaston)
• * Georgia State Route 3W (Atlanta–Marietta 1937–1946)
• * Georgia State Route 3W (Atlanta–Marietta 1954–1955)
• * Georgia State Route 3E (Thomaston)
• * Georgia State Route 3E (Atlanta–Marietta)
• Idaho State Highway 3
• Illinois Route 3
• Indiana State Road 3
• Iowa Highway 3
• K-3 (Kansas highway)
• Kentucky Route 3
• Louisiana Highway 3
• * Louisiana State Route 3
• Maine State Route 3
• Maryland Route 3
• Massachusetts Route 3
• M-3 (Michigan highway)
• Minnesota State Highway 3
• * County Road 3 (Anoka County, Minnesota)
• * County Road 3 (Chisago County, Minnesota)
• * County Road 3 (Goodhue County, Minnesota)
• * County Road 3 (Hennepin County, Minnesota)
• * County Road 3 (Ramsey County, Minnesota)
• * County Road 3 (St. Louis County, Minnesota)
• Mississippi Highway 3
• Missouri Route 3
• * Missouri Route 3 (1922)
• Montana Highway 3
• Nebraska Highway 3
• Nevada State Route 3
• New Jersey Route 3
• * County Route 3 (Monmouth County, New Jersey)
• ** County Route 3A (Monmouth County, New Jersey)
• * County Route 3 (Ocean County, New Jersey)
• New York State Route 3
• * New York [State Route 3A (1930–1932)]
• * New York State Route 3A (1932–1935)
• * New York State Route 3B (1930–1932)
• * New York State Route 3B (1932–1935)
• * New York [State Route 3C (1930–1932)]
• * New York State Route 3C (1932–1935)
• * New York State Route 3D (1931–1932)
• * New York State Route 3D (1932–1935)
• * New York State Route 3E (1930–1932)
• * New York State Route 3E (1932–1935)
• * New York State Route 3F (1931–1932)
• * New York State Route 3F (1932–1935)
• * New York State Route 3G
• * County Route 3 (Allegany County, New York)
• * County Route 3 (Cattaraugus County, New York)
• * County Route 3 (Chemung County, New York)
• * County Route 3 (Dutchess County, New York)
• * County Route 3 (Genesee County, New York)
• * County Route 3 (Greene County, New York)
• * County Route 3 (Jefferson County, New York)
• * County Route 3 (Livingston County, New York)
• * County Route 3 (Montgomery County, New York)
• * County Route 3 (Niagara County, New York)
• * County Route 3 (Oneida County, New York)
• * County Route 3 (Ontario County, New York)
• * County Route 3 (Oswego County, New York)
• * County Route 3 (Otsego County, New York)
• * County Route 3 (Rensselaer County, New York)
• * County Route 3 (Schoharie County, New York)
• * County Route 3 (Schuyler County, New York)
• * County Route 3 (St. Lawrence County, New York)
• * County Route 3 (Steuben County, New York)
• * County Route 3 (Suffolk County, New York)
• * County Route 3 (Westchester County, New York)
• North Carolina Highway 3
• North Dakota Highway 3
• Ohio State Route 3
• Oklahoma State Highway 3
• * Oklahoma State Highway 3E
• * Oklahoma State Highway 3W
• Oregon Route 3
• Pennsylvania Route 3
• Rhode Island Route 3
• South Carolina Highway 3
• Tennessee State Route 3
• Texas State Highway 3
• * Texas State Highway Loop 3
• * Texas State Highway Spur 3
• * Texas Farm to Market Road 3
• * Texas Park Road 3
• Utah State Route 3
• Vermont Route 3
• Virginia State Route 3
• Washington State Route 3
• * Primary State Highway 3 (Washington)
• West Virginia Route 3

  Territories

• Guam Highway 3
• Interstate PR-3
• Puerto Rico Highway 3
• * Puerto Rico Highway 3R

  Uruguay

• Route 3 Gral. José Artigas

  Zambia

• T3 road (Zambia)
• M3 road (Zambia)