List of rugby union players who have represented more than one nation

The following list documents rugby union players who have played for more than one national team.

Those not included in this list are:
 * Any players who could choose to represent a new country after the dissolution of their former country.
 * For example, players from the former Soviet Union who could choose to represent Russia, or players from the former Yugoslavia who could choose to represent Croatia, do not qualify for the list.
 * Any players who have played for both a combined team such as the British & Irish Lions, Pacific Islanders or South American Jaguars, and one of its constituent national teams.
 * For example, a player does not qualify for the list if they had played for the British Lions as well as one of its constituents (England, Ireland, Scotland or Wales), but they would qualify if they had represented the Lions and Australia.
 * Similarly, they would not qualify if they had played for the Pacific Islanders and either Fiji, Samoa or Tonga, but would qualify if they had represented the Pacific Islands and New Zealand.