List of highways numbered 31
The following highways are numbered 31:
International
- Asian Highway 31
- European route E31
Australia
- Hume Highway
- * Hume Motorway
- * Hume Freeway
- – South Australia
- * Gorge Road
- * Little Para Road
- * South Para Road
- * Lyndoch Valley Road
Austria
- Burgenland Schnellstraße
- Ybbstal Straße
Burma
- National Highway 31
Canada
- Alberta Highway 31
- British Columbia Highway 31
- Manitoba Highway 31
- Ontario Highway 31
- Quebec Autoroute 31
- Saskatchewan Highway 31
Cuba
- Highway 3–31
Czech Republic
- part of I/31 Highway; Czech: Silnice I/31
France
- A31 autoroute
Germany
- Bundesautobahn 31
- Bundesstraße 31
Greece
- EO31 road
Iceland
- Route 31
India
Iran
- Road 31
Ireland
- N31 road
Israel
- Highway 31
Italy
- Autostrada A31
Japan
- Japan National Route 31
- Hiroshima-Kure Road
Korea, South
- National Route 31
Netherlands
- A31 motorway
New Zealand
- New Zealand State Highway 31
South Africa
- M31 road
Sri Lanka
- A31 highway
Thailand
- Vibhavadi Rangsit Road, also known as Superhighway Road or Thailand Route 31
Turkey
- , a motorway in Turkey running from İzmir to Aydın.
United Kingdom
- British A31
- A31 road
United States
- Interstate 31
- U.S. Route 31
- * U.S. Route 31W
- * U.S. Route 31E
- Arkansas Highway 31
- California State Route 31
- * County Route J31
- * County Route S31
- Connecticut Route 31
- Florida State Road 31
- Georgia State Route 31
- Hawaii Route 31
- Idaho State Highway 31
- Illinois Route 31
- Iowa Highway 31
- K-31
- Louisiana Highway 31
- Maryland Route 31
- Massachusetts Route 31
- M-31
- Minnesota State Highway 31
- * County Road 31
- * County Road 31
- * County Road 31
- * County Road 31
- Missouri Route 31
- Nebraska Highway 31
- Nevada State Route 31
- New Hampshire Route 31
- New Jersey Route 31
- * County Route 31
- ** County Route S31
- * County Route 31
- * County Route 31
- New Mexico State Road 31
- New York State Route 31
- * New York State Route 31F
- * County Route 31
- * County Route 31
- * County Route 31
- * County Route 31
- * County Route 31
- * County Route 31
- * County Route 31
- * County Route 31
- * County Route 31
- * County Route 31
- * County Route 31
- North Carolina Highway 31
- North Dakota Highway 31
- Ohio State Route 31
- Oklahoma State Highway 31
- Oregon Route 31
- Pennsylvania Route 31
- South Carolina Highway 31
- Tennessee State Route 31
- Texas State Highway 31
- * Texas State Highway Spur 31
- * Farm to Market Road 31
- * Texas Park Road 31
- Utah State Route 31
- Vermont Route 31
- Virginia State Route 31
- * Virginia State Route 31
- Washington State Route 31
- West Virginia Route 31
- Wisconsin Highway 31
- Wyoming Highway 31