title: List of highways numbered 603
text: # List of highways numbered 603
  
  The following highways are numbered 603:
  
  ## Canada
  
  * Alberta Highway 603
  * Ontario Highway 603
  * Saskatchewan Highway 603
  
  ## Costa Rica
  
  * National Route 603
  
  ## United States
  
  * SR 603
  * PR-603
  * FM 603
  * SR 603
  * SR 603 (former)
  
  | Preceded by 602 | Lists of highways 603 | Succeeded by 604 |
  | - | - | - |
  