The following highways are numbered 505:

Canada

• Alberta Highway 505
• Manitoba Provincial Road 505
• New Brunswick Route 505
• Ontario Highway 505 (former)

Costa Rica

• National Route 505

Israel

• Route 505 (Israel)

Japan

• Japan National Route 505

United Kingdom

• A505 road

United States

• Interstate 505 (California)
  • Interstate 505 (Oregon; never built)
• Florida State Road 505
• Louisiana Highway 505
• Maryland Route 505
• County Route 505 (New Jersey)
• New Mexico State Road 505
• Ohio State Route 505
• Pennsylvania Route 505
• Ranch to Market Road 505
• Washington State Route 505

Territories

• Puerto Rico Highway 505