The 2015 World Rugby Under 20 Championship was the eighth annual international rugby union competition for Under 20 national teams. The event was organised for the second time in Italy by rugby's governing body, World Rugby. Twelve nations played in the tournament, with matches hosted by Parma, Viadana, Calvisano and Cremona, host city of the final match. England went into the tournament as the two-time defending champions after they successfully defended their title in the 2014 IRB Junior World Championship (as the tournament was known through 2014). This was the first U20 Championship held after the sport's governing body changed its name from the International Rugby Board to the current World Rugby.

New Zealand won the title after a 21–16 win against England in the final.

The championship was held across four locations. Parma, Viadana and Calvisano hosted pool matches, with the latter two hosting semi-finals for each bracket (teams 1–4, 5–8 and 9–12). Cremona hosted the final and two of the remaining positional play-offs, with Calvisano hosting the others.

The following teams participated in the 2015 World Rugby U20 Championship:

The following officials oversaw the thirty matches:

The playing schedule and pools were announced on 25 November 2014.

All times are in Central European Summer Time (UTC+2)

Points were awarded in the Pool Stage via the standard points system: