Most Rugby Union Five/Six Nations Grand Slams
- Who
- England
- What
- 13 total number
- Where
- Not Applicable
- When
- 19 March 2016
The most Grand Slams, winning all matches in what was the Five Nations and is now the Six Nations rugby union Championship, is 13 and was achieved by England in 1913–14, 1921, 1923–24, 1928, 1957, 1980, 1991–92, 1995, 2003 and 2016.
England won their first Grand Slam in 13 years to extend their outright record from Wales, who had won three Grand Slams since 2003 to move up to 11 in total. Italy are the only side yet to win a Grand Slam.