Canada and Mexico.
none! There is ocean between the 2 continents
Mexico and Canada
Canada and Mexico share land border with the US.
Australia and Antarctica are the smallest continents in terms of land area.
There are 2 continents along the equator, South America and Africa.
Canada and Mexico
Australia and Europe.
Asia and Africa.
asia and africa
Asia and Europe
The United States of America has two international land borders; one with Canada to the north (US-Canadian Border) and another with Mexico to the south (US-Mexico Border).Also the US Federal government considers that an "invisible non-land" border exists between the United States and (1) Russia (2) Cuba and (3) the Bahamas. However this is debatable as borders are traditionally defined by rivers, lakes or land divisions; not large bodies of water like seas or oceans.