List of highways numbered 121

Route 121 or Highway 121 can refer to multiple roads:

This list is incomplete; you can help by expanding it.

Canada

• Highway 121 (Ontario)
• Prince Edward Island Highway 121

United States

• U.S. Route 121
• Alabama State Route 121 (former)
• Arkansas Highway 121
• California State Route 121
• Colorado State Highway 121
• Connecticut Route 121
• Florida State Road 121
• Georgia State Route 121
• Illinois Route 121
• Indiana State Road 121
• K-121 (Kansas highway)
• Kentucky Route 121
• Louisiana Highway 121
• Maine State Route 121
• Maryland Route 121
• Massachusetts Route 121
• M-121 (Michigan highway)
• Minnesota State Highway 121
• Missouri Route 121
• Nebraska Highway 121
• Nevada State Route 121
• New Hampshire Route 121
  • New Hampshire Route 121A
• New Mexico State Road 121
• New York State Route 121
• Ohio State Route 121
• Pennsylvania Route 121
• Rhode Island Route 121
• South Carolina Highway 121
• Texas State Highway 121
  • Texas State Highway Loop 121
• Utah State Route 121
• Vermont Route 121
• Virginia State Route 121
• Washington State Route 121
• Wisconsin Highway 121