List of highways numbered 503
# List of highways numbered 503

The following highways are numbered 503:

## Canada

* Alberta Highway 503
* Manitoba Provincial Road 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

| Preceded by 502 | Lists of highways 503 | Succeeded by 504 |
| - | - | - |
