List of highways numbered 503

The following highways are numbered 503:

Canada[]

• Alberta Highway 503
• 
• Newfoundland and Labrador Route 503
• Ontario Highway 503 (former)

Costa Rica[]

• National Route 503

India[]

• National Highway 503 (India)

Japan[]

• Japan National Route 503

United States[]

• County Road 503 (Brevard County, Florida)
• Maryland Route 503 (former)
• County Route 503 (New Jersey)
• Ohio State Route 503
• Washington State Route 503

Territories

• Puerto Rico Highway 503

This list is incomplete; you can help by . (October 2010)

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