| Badge Size: | 50 |
| Nickname: | Blues |
| Governing Body: | New South Wales Rugby League |
| Coach: | Mark O’Meley |
| Captain: | Phoenix Crossland |
| Home Stadium: | ANZ Stadium (83,500) |
| Pattern La1: | _whiteborder |
| Pattern Ra1: | _whiteborder |
| Leftarm1: | 002551 |
| Body1: | 86D1FD |
| Rightarm1: | 002551 |
| Shorts1: | 002551 |
| Socks1: | 86D1FD |
| First Game: | New South Wales 34–12 Queensland (Suncorp Stadium, Brisbane; 11 June 2008) |
| Largest Win: | New South Wales 56–6 Queensland (Suncorp Stadium, Sydney; 26 June 2013) |
| Largest Loss: | Queensland 24–18 New South Wales (ANZ Stadium, Sydney; 4 July 2012) |
The New South Wales Under-18's rugby league team, also known as New South Wales Under-18's or New South Wales U18, represents New South Wales in the sport of rugby league at an under-18 age level. Since 2008, the team has played an annual fixture against the Queensland Under-18's team as a curtain raiser to a State of Origin game. The team features players selected from New South Wales's premier under-18 rugby league competition, the S.G. Ball Cup. They are administered by the New South Wales Rugby League.
Prior to 2008, junior interstate matches were contested at under-17 and under-19 levels. In 2008, with the advent of the National Youth Competition, the age levels switched to an under-16 and under-18 format to keep in line with the NSWRL's existing SG Ball Cup and Harold Matthews Cup competitions and the QRL's Mal Meninga Cup and Cyril Connell Cup competitions, which would begin in 2009.
New South Wales saw success in the first four under-18 Origin fixtures, winning every game until 2012. New South Wales would win another two more fixtures in 2013 and 2014 before picking up their second lose in 2015, losing to Queensland 22-18 at the Melbourne Cricket Ground. Since 2015 New South Wales have won every under-18 Origin fixture, in 2016, 2017 and 2018.
Players selected for the New South Wales under-18 team are usually contracted with a National Rugby League (NRL) side but play in either the S.G. Ball Cup, Holden Cup or Intrust Super Premiership competitions. Each pre-season the New South Wales Rugby League will select an under-18 squad featuring players in contention for the mid-season fixture.
Since 2008, fifteen former New South Wales under-18 players have gone onto represent New South Wales at State of Origin level:
Played as a curtain raiser to Game II of the 2008 State of Origin series.
Played as a curtain raiser to Game II of the 2009 State of Origin series.
Played as a curtain raiser to Game II of the 2010 State of Origin series.
Played as a curtain raiser to Game II of the 2011 State of Origin series.
Played as a curtain raiser to Game III of the 2012 State of Origin series.
Played as a curtain raiser to Game II of the 2013 State of Origin series.
Played as a curtain raiser to Game II of the 2014 State of Origin series.[1]
Played as a curtain raiser to Game II of the 2015 State of Origin series.[2]
Played as a curtain raiser to Game II of the 2016 State of Origin series.[3]
Played as a curtain raiser to Game II of the 2017 State of Origin series.[4]
Played as a curtain raiser to Game I of the 2018 State of Origin series.[5]