1990 Five Nations Championship

The 1990 Five Nations Championship was the 61st series of the Five Nations Championship, an annual rugby union competition between the major Northern Hemisphere rugby union national teams. The tournament consisted of ten matches held between 16 January and 24 March 1990.

The tournament was the 61st in its then format as the Five Nations. Including the competition's former incarnation as the Home Nations Championship, the 1990 Five Nations Championship was the 96th Northern Hemisphere rugby union championship.

The championship was contested by England, France, Ireland, Scotland and Wales. Scotland won the tournament, achieving a final 13–7 victory over England to win the Grand Slam, their first since 1984 and third overall in the Five Nations. This was also their thirteenth outright victory, including nine victories in the Home Nations, excluding eight titles shared with other countries. It was only the third time (after 1978 and 1984) that two teams met in the final round of matches with three victories each and a Grand Slam at stake for both: and the first time that the Triple Crown had also been at stake at the same time, as a result of England and Scotland's earlier victories over the other Home Nations. To cap it all, it was also a match for the Calcutta Cup. England and France placed second and third with three and two wins respectively, while Ireland and Wales placed fourth and fifth with one victory and none. This was Wales's first whitewash in Championship history.

This was Scotland's final Grand Slam in the Five Nations and penultimate overall win, as they would later win the final 1999 Five Nations Championship on points difference. It also remains Scotland's most recent Grand Slam win, as they have yet to win a Grand Slam since Italy joined what became the Six Nations Championship in 2000.