| P19 Allsvenskan | |
| Confed: | UEFA |
| Champions: | Hammarby IF |
| Season: | 2022 |
| Most Successful Club: | IFK Göteborg (9 titles) |
| Teams: | 14 |
| Relegation: | P19 Superettan |
| Levels: | 1 |
| Domest Cup: | Ligacupen P19 |
P19 Allsvenskan is the highest level of men's association football for Swedish under-19 teams, and determines the under-19 (or junior) Swedish championships. The title has been officially contested since 1982 in different formats, IFK Göteborg being the most successful team with nine titles.
The junior championships for club teams (Swedish: juniormästerskap för klubblag, also Swedish: junior-SM or Swedish: JSM) for boys have been played since 1982, but the competition had several unofficial precursors. A cup tournament, Swedish: Allsvenska ungdomscupen|italic=no, was played from 1945 to 1976, and was open to member clubs of the Swedish Professional Football Leagues. The title unofficial junior champions was awarded to the winners of the tournament, which was discontinued when the newspaper Expressen withdrew their sponsorship. For the years between 1949 and 1958, the winner of this cup also played a national final (Swedish: Riksfinal|italic=no) against the winners of the Norrland junior championships (Swedish: Norrländska juniormästerskapen|italic=no).
The Swedish Professional Football Leagues also arranged a league starting in 1971, Swedish: Allsvenska ungdomsserien|italic=no, only open to youth teams of Allsvenskan clubs. A champion was decided through a final match between group winners, and was open to all Swedish Professional Football Leagues members from 1977. This league was sometimes also called Swedish: Allsvenska utvecklingsserien|italic=no, and saw continued play in parallel to the in 1982 introduced official junior championships, initially played in a strict cup format.
In 1990, the youth league was rebranded as Swedish: Juniorallsvenskan|italic=no, and the play-off following the league replaced the separate cup tournament as the competition to decide the official junior champions. The championship is played in league format, currently named Swedish: P19 Allsvenskan|italic=no, until 2021 consisting of two regional groups, followed by a final between the two winning teams to determine the junior champions. From 2022, the league format has been changed to consist of a single group of 14 teams with no play-off.
From 1982 until 2008, the championships were played with an age limit of 18, but from 2009 on the age limit has been 19.
The competition is played in a single league, round-robin format of 14 teams since 2022. Players are eligible to play if they are at most 19 years old on the 31 December of the season year.
| Year | Winner | Ref |
|---|---|---|
| Under-18 championships (Swedish: junior-SM) | ||
| 1982 | Malmö FF (1) | |
| 1983 | IFK Sundsvall (1) | |
| 1984 | Örebro SK (1) | |
| 1985 | IFK Eskilstuna (1) | |
| 1986 | IFK Göteborg (1) | |
| 1987 | IFK Göteborg (2) | |
| 1988 | IFK Göteborg (3) | |
| 1989 | IF Brommapojkarna (1) | |
| 1990 | Lundby IF (1) | |
| 1991 | IFK Norrköping (1) | |
| 1992 | Helsingborgs IF (1) | |
| 1993 | Malmö FF (2) | |
| 1994 | Djurgårdens IF (1) | |
| 1995 | Gunnilse IS (1) | |
| 1996 | IFK Göteborg (4) | |
| 1997 | IFK Göteborg (5) | |
| 1998 | Malmö FF (3) | |
| 1999 | IFK Göteborg (6) | |
| 2000 | Västra Frölunda IF (1) | |
| 2001 | Malmö FF (4) | |
| 2002 | Örgryte IS (1) | |
| 2003 | Djurgårdens IF (2) | |
| 2004 | AIK (1) | |
| 2005 | BK Häcken (1) | |
| 2006 | IF Brommapojkarna (2) | |
| 2007 | AIK (2) | |
| 2008 | IF Brommapojkarna (3) | |
| Under-19 championships (Swedish: junior-SM) | ||
| 2009 | IF Elfsborg (1) | |
| 2010 | Malmö FF (5) | |
| 2011 | BK Häcken (2) | |
| 2012 | Halmstads BK (1) | |
| 2013 | IFK Göteborg (7) | |
| 2014 | BK Häcken (3) | |
| 2015 | IFK Göteborg (8) | |
| 2016 | Malmö FF (6) | |
| 2017 | IF Elfsborg (2) | |
| 2018 | Hammarby IF (1) | |
| 2019 | IF Elfsborg (3) | |
| 2020 | ||
| 2021 | IFK Göteborg (9) | |
| 2022 | Hammarby IF (2) | |
| Club | Winners | Winning seasons | |
|---|---|---|---|
| IFK Göteborg | 9 | 1986, 1987, 1988, 1996, 1997, 1999, 2013, 2015, 2021 | |
| Malmö FF | 6 | 1982, 1993, 1998, 2001, 2010, 2016 | |
| IF Brommapojkarna | 3 | 1989, 2006, 2008 | |
| IF Elfsborg | 3 | 2009, 2017, 2019 | |
| BK Häcken | 3 | 2005, 2011, 2014 | |
| Djurgårdens IF | 2 | 1994, 2003 | |
| AIK | 2 | 2004, 2007 | |
| Hammarby IF | 2 | 2018, 2022 | |
| Västra Frölunda IF | 1 | 2000 | |
| Halmstads BK | 1 | 2012 | |
| IFK Sundsvall | 1 | 1983 | |
| IFK Eskilstuna | 1 | 1985 | |
| Örebro SK | 1 | 1984 | |
| Lundby IF | 1 | 1990 | |
| IFK Norrköping | 1 | 1991 | |
| Helsingborgs IF | 1 | 1992 | |
| Gunnilse IS | 1 | 1995 | |
| Örgryte IS | 1 | 2002 |