The following highways are numbered 174:
 | This list is incomplete; you can help by adding missing items. (August 2008) |
Brazil
Canada
Costa Rica
Ireland
Japan
Route 174 (Japan) (Japan's shortest national highway)
United Kingdom
- A174 road
- B174 road
United States
- Interstate 174 (proposed)
- Alabama State Route 174
- California State Route 174
- Connecticut Route 174
- Georgia State Route 174
- Illinois Route 174 (former)
- Kentucky Route 174
- Louisiana Highway 174
- Maine State Route 174
- Maryland Route 174
- M-174 (Michigan highway)
- Missouri Route 174
- New Jersey Route 174 (former)
- New Mexico State Road 174
- New York State Route 174
- Ohio State Route 174
- Pennsylvania Route 174
- South Carolina Highway 174
- Tennessee State Route 174
- Texas State Highway 174
- Utah State Route 174
- Virginia State Route 174
- Washington State Route 174
- Wisconsin Highway 174 (former)
- Wyoming Highway 174
Territories:
| Preceded by 173 |
Lists of highways 174 |
Succeeded by 175 |
