Atlantic Transport Line
| SS Mongolia underway | |
| Industry | Shipping | 
|---|---|
| Founded | 1881 in United States | 
| Founder | Bernard N Baker | 
| Defunct | 1936 | 
| Headquarters | , United States | 
| Area served | North Atlantic | 
| Services | Passenger and Cargo transport, including live cattle | 
The Atlantic Transport Line was an American passenger shipping line based in Baltimore, Maryland. In 1901 the company was folded into the International Mercantile Marine Company (IMM).