| Company type | Transportation |
|---|---|
| Industry | Interurban |
| Predecessor | Mousam River Railroad. Sanford and Cape Porpoise Railway. Portsmouth Kittery and York Street Railway. Portsmouth, Dover and York Street Railway. |
| Founded | February 9, 1900 |
The Atlantic Shore Line (ASL) was an electric trolley line providing passenger and freight service to many towns in York County, Maine, in the United States. The ASL was the second-longest trolley line in Maine, encompassing over 87 miles (140 km) of track.