Want this question answered?
Mexico is the southern neighbor of the United States.
Mexico is the closest southern neighbor for most of the US.
USA is the closest southern neighbor of Canada.
Gavdos, a Greek island.
Australias an island, so it has none =.=, PNG, Nz, Malaysia and Antarctica are pretty close to it though.
There are no countries in Tasmania. Tasmania is Australia's southern island state.
There are some countries near to the island. sri lanka is close to india. india and sri lanka are neighbors.
Egypt.
alabama
South African Republic (SAR) is Botswana's southern neighbor. http://www.mapsnworld.com/world-map-political.html
The island of Sri Lanka.
Mexico is the southern neighbor of the U.S.