I assume you mean "Which ocean doesn't border the US coastline?".
The Indian and Southern Oceans
(Deleted: 'Artic' ... which I presume was meant as Arctic ... which the U.S. does have a coast with in Alaska)
The Southern Ocean is the world's newest-recognized and fourth-largest ocean. In the spring of 2000, the International Hydrographic Organization decided to delimit a fifth ocean. In doing so, boundaries were taken from the Pacific, Atlantic and Indian Oceans. The Southern Ocean extends from the coast of Antarctica to 60 degrees south latitude. It has a total area of 7,848,300 square miles (20,327,000 sq km) and an average depth ranging from 13,100 to 16,400 feet (4,000 to 5,000 m). The deepest point in the Southern Ocean is unnamed but it is in the south end of the South Sandwich Trench and has a depth of -23,737 feet (-7,235 m). The world's largest ocean current, the Antarctic Circumpolar Current moves east and is 13,049 feet (21,000 km) in length.
Indian
which ocean borders the us?
the ocean that forms the western border of the US is the Pacific Ocean
The Atlantic Ocean.
The eastern border of the US was and is the Atlantic Ocean.
The Atlantic Ocean defines the United States' eastern border.
The Atlantic ocean.
artic ocean,pacific ocean,and atlantic ocean.
Antarctic (The three that I know of that the US does border is the Arctic, Pacific, and Atlantic)
Atlantic
ocean's
Nope
Pacific