The Under-19 World Lacrosse Championships (U-19) are held separately for men and women every four years to award world championships for the under-19 age group in men's lacrosse and women's lacrosse. The tournaments are sanctioned by World Lacrosse.
These championships were first held for men in 1988 and for women in 1995. They have only been held in the same year twice and both times in the same country; 1999 in Australia and 2003 in the United States. The United States has won every men's U-19 tournament and all but two women's U-19 tourneys.
The 2008 men's championship was held in July 2008 in Coquitlam, British Columbia, Canada and was won by the United States. The 2012 men's tournament was held in Turku, Finland, with the United States winning the title, defeating Canada 10-8, despite a pair of pool-play losses to Canada and the Iroquois Nationals. The Iroquois Nationals finished third after an 18–1 win over England. The 2016 championship for men was held July 7–16, 2016, again in Coquitlam, British Columbia, just outside Vancouver. The U.S. won its eighth title, coming back from being down 6-0 to eventually defeat Canada 13-12.
Men's U-19 World Championship
|1988||United States||Canada||Adelaide, Australia|
|1992||United States||Australia||Long Island, United States|
|1996||United States||Australia||Tokyo, Japan|
|1999||United States||Canada||Adelaide, Australia|
|2003||United States||Canada||Baltimore, United States|
|2008||United States||Canada||Coquitlam, Canada|
|2012||United States||Canada||Turku, Finland|
|2016||United States||Canada||Coquitlam, Canada|
Women's U-19 World Championship
|1995||Australia||United States||Haverford, United States|
|1999||United States||Australia||Perth, Australia|
|2003||United States||Australia||Baltimore, United States|
|2007||United States||Australia||Peterborough, Canada|
|2011||United States||Australia||Hanover, Germany|
|2015||Canada||United States||Edinburgh, Scotland|
|2019||United States||Canada||Peterborough, Canada|
- "US eight-peats with dramatic comeback over Canada". Retrieved 16 November 2017.
- "FIL Rathbones Women's 2015 U19 Lacrosse World Championship". Retrieved 16 November 2017.
- Record 23 lacrosse teams to play at Men's Under-21 World Championship Ali Iveson (Inside the Games), 30 May 2021. Accessed 9 June 2021.
- "History". Retrieved 16 November 2017.
- "Past Results". Retrieved 16 November 2017.