List of highways numbered 138
Highway 138 may refer to:
Canada
- Ontario Highway 138
- Prince Edward Island Route 138
- Quebec Route 138
Costa Rica
- National Route 138
India
- National Highway 138
Japan
- Japan National Route 138
- Fukuoka Prefectural Route 138
- Nara Prefectural Route 138
Malaysia
- Malaysia Federal Route 138
United Kingdom
- road
- B138 road
United States
- U.S. Route 138
- Alabama State Route 138
- * County Route 138
- Arkansas Highway 138
- California State Route 138
- Connecticut Route 138
- Florida State Road 138
- * County Road 138
- * County Road 138
- * County Road 138A
- * County Road 138
- Georgia State Route 138
- Hawaii Route 138
- Illinois Route 138
- K-138
- Kentucky Route 138
- Louisiana Highway 138
- Maine State Route 138
- Maryland Route 138
- Massachusetts Route 138
- M-138
- Missouri Route 138
- New Jersey Route 138
- New Mexico State Road 138
- New York State Route 138
- * County Route 138
- * County Route 138
- * County Route 138
- North Carolina Highway 138
- Ohio State Route 138
- Oregon Route 138
- Pennsylvania Route 138
- Rhode Island Route 138
- * Rhode Island Route 138A
- Tennessee State Route 138
- Texas State Highway 138
- * Texas State Highway Spur 138
- * Farm to Market Road 138
- Utah State Route 138
- * Utah State Route 138
- Virginia State Route 138
- * Virginia State Route 138
- Wisconsin Highway 138
- Wyoming Highway 138