The following highways are numbered 187:

• R187 road (Ireland)

• Japan National Route 187

• A187 road
• B187 road

• U.S. Route 187 (former)
• Alabama State Route 187
• Arizona State Route 187
• Arkansas Highway 187
• California State Route 187
• Colorado State Highway 187
• Connecticut Route 187
• Florida State Road 187
• Georgia State Route 187
• Hawaii Route 187
• Iowa Highway 187
• K-187 (Kansas highway)
• Kentucky Route 187
• Maine State Route 187
• Maryland Route 187
• Massachusetts Route 187
• Missouri Route 187
• Montana Highway 187 (former)
• New Jersey Route 187
• New Mexico State Road 187
• New York State Route 187
• Ohio State Route 187
• Pennsylvania Route 187
• South Carolina Highway 187
• Tennessee State Route 187
• Texas State Highway 187 (former)
  • Texas State Highway Loop 187
  • Ranch to Market Road 187 (Texas)
• Utah State Route 187 (former)
• Virginia State Route 187
• Wisconsin Highway 187

Territories

• Puerto Rico Highway 187
  • Puerto Rico Highway 187R