The following highways are numbered 233:

Canada

• Manitoba Provincial Road 233
• Newfoundland and Labrador Route 233
• Prince Edward Island Route 233
• Quebec Route 233

Costa Rica

• National Route 233

Ireland

• R233 regional road

Japan

• Japan National Route 233

United States

• Alabama State Route 233
• Arkansas Highway 233
• California State Route 233
• Colorado State Highway 233
• Georgia State Route 233
• K-233 (Kansas highway)
• Kentucky Route 233
• Maine State Route 233
• Montana Secondary Highway 233
• Nevada State Route 233
• New Mexico State Road 233
• New York State Route 233
• Ohio State Route 233
• Oregon Route 233
• Pennsylvania Route 233
• Tennessee State Route 233
• Texas State Highway 233 (former)
  • Texas State Highway Spur 233
• Utah State Route 233 (former)
• Virginia State Route 233
• Wyoming Highway 233