List of highways numbered 23

Route 23, or Highway 23, can refer to:

International[]

E23 European route E23

Australia[]

Federal Highway (Australia)
Monaro Highway
(South Australia)
Dorat Road (not signed everywhere)

Austria[]

Autobahn Südosttangente Wien

Canada[]

Costa Rica[]

National Route 23

Czech Republic[]

; Czech: Silnice I/23

Finland[]

Finnish national road 23

India[]

National Highway 23 (India)

Japan[]

Korea, South[]

National Route 23

Malaysia[]

Malaysia Federal Route 23

Mexico[]

Mexican Federal Highway 23

New Zealand[]

State Highway 23

Norway[]

Norwegian National Road 23

United Kingdom[]

United States[]

U.S. Route 23
Alabama State Route 23
Arkansas Highway 23
- Arkansas Highway 23W (former)
California State Route 23
- County Route A23 (California)
- County Route J23 (California)
Colorado State Highway 23
Delaware Route 23
Florida State Road 23
Georgia State Route 23
Illinois Route 23
Indiana State Road 23
Iowa Highway 23
K-23 (Kansas highway)
Louisiana Highway 23
- Louisiana State Route 23
Maine State Route 23
Maryland Route 23
- (former)
Massachusetts Route 23
M-23 (Michigan highway) (former)
Minnesota State Highway 23
- County Road 23 (Anoka County, Minnesota)
- County Road 23 (Dakota County, Minnesota)
- County Road 23 (Ramsey County, Minnesota)
Mississippi Highway 23
Missouri Route 23
- Missouri Route 23 (1922) (former)
Montana Highway 23
Nebraska Highway 23
Nevada State Route 23 (former)
New Jersey Route 23
- County Route 23 (Monmouth County, New Jersey)
New Mexico State Road 23
New York State Route 23
- County Route 23 (Allegany County, New York)
- County Route 23 (Cattaraugus County, New York)
- County Route 23 (Cayuga County, New York)
- County Route 23 (Clinton County, New York)
- County Route 23 (Dutchess County, New York)
- County Route 23 (Genesee County, New York)
- County Route 23B (Greene County, New York)
- County Route 23C (Greene County, New York)
- County Route 23 (Herkimer County, New York)
- County Route 23 (Lewis County, New York)
- County Route 23 (Livingston County, New York)
- County Route 23 (Niagara County, New York)
- County Route 23 (Onondaga County, New York)
- County Route 23 (Orange County, New York)
- County Route 23 (Oswego County, New York)
- County Route 23 (Otsego County, New York)
- County Route 23 (Putnam County, New York)
- County Route 23 (Rensselaer County, New York)
- County Route 23 (Rockland County, New York)
- County Route 23 (Schuyler County, New York)
- County Route 23 (St. Lawrence County, New York)
- County Route 23 (Suffolk County, New York)
- County Route 23 (Sullivan County, New York)
- County Route 23 (Tioga County, New York)
- County Route 23 (Warren County, New York)
- County Route 23 (Washington County, New York)
North Carolina Highway 23 (former)
North Dakota Highway 23
- North Dakota Highway 23B (McKenzie County)
- North Dakota Highway 23B (Mountrail County)
Ohio State Route 23 (1923-1927) (former)
Oklahoma State Highway 23
Oregon Route 23 (former)
Pennsylvania Route 23
South Carolina Highway 23
South Dakota Highway 23 (former)
Tennessee State Route 23
Texas State Highway 23
- Texas State Highway Loop 23 (former)
- Texas State Highway Spur 23 (former)
- Farm to Market Road 23
- Texas Park Road 23
Utah State Route 23
Vermont Route 23
State Route 23 (Virginia 1918-1933) (former)
Washington State Route 23
West Virginia Route 23
Wisconsin Highway 23