^ abAlthough Alaska and the Lower 48 each border on two oceans, no single contiguous US territory borders on three oceans.
^The boundary between North and South America is somewhat arbitrary. Although atlases today generally show Panama entirely within North America, some 19th century atlases showed the continental boundary along the border between Nicaragua and Panama, which was then part of Colombia.
^Chile borders on three oceans if the Southern and Atlantic Oceans are considered to meet in its territory, but only on two otherwise.
^Argentina borders on two oceans if the Drake Passage is counted as part of the Southern Ocean, but only on one if it is considered part of the South Atlantic.
^Australia borders on three oceans if the Southern Ocean is considered to extend that far north, but only on two otherwise.
^Antarctica is included on this list although not a country. If the Southern ocean is considered a separate ocean, it borders on only that one ocean. If, however, the Southern Ocean is considered to be merely part of the Pacific, Atlantic, and Indian oceans, Antarctica borders on all three.