The 1879–80 Home Nations rugby union matches were a series of international rugby union friendlies held between the England, Ireland and Scotland national rugby union teams. The only recognised competition held between the countries was the annual Calcutta Cup match, contested between England and Scotland. It was the second challenge for the Cup.

Results

Scoring system

The matches for this season were decided on goals scored. A goal was awarded for a successful conversion after a try, for a dropped goal or for a goal from mark. If a game was drawn, any unconverted tries were tallied to give a winner. If there was still no clear winner, the match was declared a draw.

The matches

Ireland vs. England

Scotland vs. Ireland

England vs. Scotland