Route 12 or Highway 12 can refer to:
For a list of roads named A12, see A12 roads.
International
Asian Highway 12
European route E12
European route E012
Argentina
National Route 12
Australia
NSW
Western Sydney Airport Motorway (proposed)
NT
Plenty Highway
VIC/SA
Mallee Highway
South Gippsland Highway
Austria
Inntal Autobahn
Bulgaria
Републикански път I-12
Canada
Alberta Highway 12
British Columbia Highway 12
Manitoba Highway 12
Nova Scotia Trunk 12
Ontario Highway 12
Prince Edward Island Route 12
Quebec Route 12 (former) Saskatchewan Highway 12
China
G12 Expressway
Czech Republic
I/12 Highway; Czech: Silnice I/12
Dominican Republic
DR-12
India
National Highway 12 (India)
Iran
Road 12
Iraq
Highway 12 (Iraq)
Ireland
N12 road (Ireland)
Israel
Highway 12 (Israel)
Italy
Autostrada A12
RA 12
State road 12
Japan
Japan National Route 12
Korea, South
Expressway 12
Muan–Gwangju Expressway
Gwangju–Daegu Expressway
Malaysia
Tun Razak Highway
New Zealand
New Zealand State Highway 12
Pakistan
M-12 motorway Sambrial-Kharian
Paraguay
National Route 12
Poland
Motorway A12 (former; 1986–2000/2001) Expressway S12 National road 12
Romania
DN12 - Drumul Național 12
A12 - Pitești–Craiova Expressway
South Africa
N12 road (South Africa)
Taiwan
Provincial Highway 12 (Taiwan)
United Kingdom
British A12 (London-Great Yarmouth) Northern Irish M12 (Craigavon) A12 road (Northern Ireland)
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 County Route A12 (California) County Route E12 (California) County Route G12 (California) County Route J12 (California) County Route S12 (California) Colorado State Highway 12 Connecticut Route 12 Delaware Route 12 Florida State Road 12 County Road 12 (Gadsden County, Florida) County Road 12 (Leon County, Florida) 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 County Route 12 (Monmouth County, New Jersey) 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 Texas State Highway Loop 12 Ranch to Market Road 12 Texas Park Road 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