| Tonga U20 | |
| Badge: | Flag of Tonga.svg |
| Fifa Trigramme: | TGA |
| Association: | Tonga Football Association |
| Confederation: | OFC (Oceania) |
| Coach: |  Timote Polovili |
| Captain: | Sione Tu'ifangaloka |
| Most Caps: | Sione Tu'ifangaloka Tevita Vakatapu Vai Lutu (8) |
| Top Scorer: | Hemaloto Polovili (3) |
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| First Game: | 1–0 (Apia, Samoa; 15 August 1998) |
| Largest Win: | 0–3 (Rarotonga, Cook Islands; 26 May 2018) |
| Largest Loss: | 0–19 (Honiara, Solomon Islands; 25 January 2005) |
| World Cup Apps: | 0 |
| Regional Name: | OFC U-20 Championship |
| Regional Cup Apps: | 7 (1998, 2001, 2002, 2005, 2016, 2018, 2022) |
| Regional Cup Best: | Group Stage (6 times) |
The Tonga national under-20 football team represents Tonga in international Under 20 or youth football competitions and is controlled by the Tonga Football Association.
The OFC Under 20 Qualifying Tournament is a tournament held once every two years to decide the only two qualification spots for the Oceania Football Confederation (OFC) and its representatives at the FIFA U-20 World Cup.
| OFC U-19 Championship | Qualification record | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Year | Round | |||||||||||||
| 1974 | Did not enter | No qualification | ||||||||||||
 1978 | ||||||||||||||
| 1980 | ||||||||||||||
 1982 | ||||||||||||||
 1985 | ||||||||||||||
| 1986 | ||||||||||||||
| 1988 | ||||||||||||||
| 1990 | ||||||||||||||
| 1992 | ||||||||||||||
| 1994 | ||||||||||||||
| 1997 | ||||||||||||||
| 1998 | Group stage | 3 | 0 | 0 | 3 | 1 | 16 | |||||||
  2001 | 5 | 1 | 1 | 3 | 3 | 21 | ||||||||
| 2002 | 4 | 0 | 0 | 4 | 4 | 28 | ||||||||
| 2005 | 3 | 0 | 0 | 3 | 1 | 28 | ||||||||
| 2007 | Did not enter | |||||||||||||
| 2008 | ||||||||||||||
| 2011 | ||||||||||||||
| 2013 | ||||||||||||||
| 2014 | ||||||||||||||
| 2016 | Did not qualify | 3 | 0 | 3 | 0 | 5 | 5 | |||||||
| 2018 | Group stage | 3 | 0 | 0 | 3 | 0 | 20 | 3 | 2 | 1 | 0 | 6 | 1 | |
| 2022 | 3 | 0 | 0 | 3 | 0 | 14 | No qualification | |||||||
| 2024 | Did not qualify | 3 | 1 | 1 | 1 | 5 | 7 | |||||||
| Total | Group stage | 33 | 4 | 6 | 20 | 25 | 140 | |||||||
| U-20 World Cup record | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| width= | Year | width= | Round | width= | width= | width= | width= | width= | width= | width= | width= | ||||||||
 1977 to  2025 | Did not qualify | ||||||||||||||||||
| Total | TBD | 0/24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
The following players were called up for the 2022 OFC U-19 Championship from 7 to 20 September 2022. Names in italics denote players who have been capped for the Senior team.
Caps and goals as of 16 September 2022 after the game against Fiji.