Route 12 or Highway 12 can refer to:
For a list of roads named A12, see A12 roads.
International
Argentina
Australia
NSW
Western Sydney Airport Motorway (proposed)
NT
VIC/SA
Austria
Bulgaria
Canada
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China
Czech Republic
I/12 Highway; Czech: Silnice I/12
Dominican Republic
India
Iran
Iraq
Ireland
Israel
Italy
Japan
Korea, South
Expressway 12
Malaysia
New Zealand
Nigeria
Pakistan
Paraguay
Poland
Motorway A12 (former; 1986–2000/2001)
Expressway S12
National road 12
Romania
- DN12 - Drumul Național 12
- A12 - Pitești–Craiova Expressway
South Africa
Taiwan
United Kingdom
United States
Interstate 12
U.S. Route 12
New England Interstate Route 12 (former)
Alabama State Route 12 (former)
Arkansas Highway 12
California State Route 12
Colorado State Highway 12
Connecticut Route 12
Delaware Route 12
Florida State Road 12
Georgia State Route 12
Illinois Route 12 (former)
Iowa Highway 12
County Route C12 (Humboldt County, Iowa)
K-12 (Kansas highway) (former)
Kentucky Route 12
Louisiana Highway 12
Louisiana State Route 12 (former)
Maryland Route 12
Massachusetts Route 12
M-12 (Michigan highway) (former)- Mississippi Highway 12
Missouri Route 12
Nebraska Highway 12
Nevada State Route 12 (former)
New Hampshire Route 12- New Jersey Route 12
New Mexico State Road 12
New York State Route 12
County Route 12 (Allegany County, New York)- County Route 12 (Cattaraugus County, New York)
- County Route 12 (Chemung County, New York)
- County Route 12 (Chenango County, New York)
County Route 12 (Clinton County, New York)- County Route 12 (Genesee County, New York)
- County Route 12 (Greene County, New York)
- County Route 12 (Jefferson County, New York)
County Route 12 (Nassau County, New York)- County Route 12 (Niagara County, New York)
- County Route 12 (Onondaga County, New York)
- County Route 12 (Otsego County, New York)
County Route 12 (Putnam County, New York)
County Route 12 (Schuyler County, New York)- County Route 12 (St. Lawrence County, New York)
- County Route 12 (Steuben County, New York)
County Route 12 (Suffolk County, New York)- County Route 12 (Ulster County, New York)
County Route 12 (Warren County, New York)
North Carolina Highway 12
Ohio State Route 12
Pennsylvania Route 12
Rhode Island Route 12
South Carolina Highway 12
South Dakota Highway 12 (former)
Tennessee State Route 12
Texas State Highway 12
Utah State Route 12
Vermont Route 12
State Route 12 (Virginia 1918-1933) (former)- State Route 12 (Virginia 1933-1935) (former)
- State Route 12 (Virginia 1935-1953) (former)
State Road 12 (Washington 1905–1919) (former)- Washington State Route 12 (1964-1967) (former)
Primary State Highway 12 (Washington) (former)
Secondary State Highway 12G (Washington) (former)
Secondary State Highway 12H (Washington) (former)
West Virginia Route 12
Wisconsin Highway 12 (former)
Wyoming Highway 12
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- Territories
Uruguay
Zambia
See also
- List of A12 roads
- List of highways numbered 12A
- List of highways numbered 12B
- List of highways numbered 12C
- List of highways numbered 12D
- List of highways numbered 12E
- List of highways numbered 12F
| Preceded by 11 | Lists of highways 12 | Succeeded by 13 |