Seaboard is a synonym for coast.
Seaboard can also refer to:
- Seaboard, North Carolina, a small town in the United States
- Seaboard Corporation, an international agribusiness company
- Seaboard International, an international oilfield equipment engineering and manufacturing company, or its subsidiary Seaboard Wireline
- Seaboard Air Line Railroad in the United States or its successors:
- Seaboard Coast Line Railroad
- Seaboard System Railroad
- Seaboard World Airlines (1960 to 1980), an international cargo airline that also served as a U.S. military carrier
- Seaboard World Airlines Flight 253A, a Soviet-American airspace incident in 1968