| 2023 Six Nations Under 20s Championship | |||
|---|---|---|---|
| Date | 3 February 2023 – 19 March 2023 | ||
| Countries | |||
| Tournament statistics | |||
| Champions |  Ireland (5th title) | ||
| Grand Slam | Ireland (4) | ||
| Triple Crown | Ireland | ||
| Matches played | 15 | ||
| |||
The 2023 Six Nations Under 20s Championship was the 16th Six Nations Under 20s Championship, the annual northern hemisphere rugby union championship for players under 20 years of age. Ireland retained the championship, their fifth, winning all five matches as they had done in the last tournament to record a fourth Grand Slam.[1][2] Ireland became the first team to win back-to-back Grand Slams in the history of the tournament.
- ^ "Ireland claim Grand Slam with England win". BBC Sport. 19 March 2023. Retrieved 22 March 2023.
- ^ "Ireland U-20s make it two Grand Slams in 24 hours". Irish Independent. 19 March 2023. Retrieved 22 March 2023.