List of highways numbered 173

The following highways are numbered 173:

Canada

• Prince Edward Island Route 173
• Quebec Route 173

Japan

• Japan National Route 173

United States

• Alabama State Route 173
• Arizona State Route 173 (former)
• California State Route 173
• Connecticut Route 173
• Florida State Road 173
• Georgia State Route 173
• Illinois Route 173
• Iowa Highway 173
• K-173 (Kansas highway)
• Kentucky Route 173
• Louisiana Highway 173
• Maine State Route 173
• Maryland Route 173
• M-173 (Michigan highway) (former)
• Missouri Route 173
• New Jersey Route 173
• New Mexico State Road 173
• New York State Route 173
• Ohio State Route 173
• Oregon Route 173
• Pennsylvania Route 173
• South Carolina Highway 173
• Tennessee State Route 173
• Texas State Highway 173
  • Texas State Highway Loop 173
  • Farm to Market Road 173 (Texas)
• Utah State Route 173
• Virginia State Route 173
• Washington State Route 173
• Wisconsin Highway 173
• Wyoming Highway 173