| Per-Ola Ljung | |
| Fullname: | Per-Ola Ljung |
| Birth Date: | 7 November 1967 |
| Birth Place: | Sweden |
| Position: | Defender |
| Youthclubs1: | Hästveda IF |
| Years1: | –1987 |
| Clubs1: | IFK Hässleholm |
| Years2: | 1988–1999 |
| Clubs2: | Helsingborgs IF |
| Caps2: | 513 |
| Years3: | 1997 |
| Clubs3: | → Watford (trial) |
| Caps3: | 0 |
| Goals3: | 0 |
| Years4: | 2000–2002 |
| Clubs4: | Landskrona BoIS |
| Manageryears1: | 2004 |
| Managerclubs1: | Torns IF |
| Manageryears2: | 2005–2006 |
| Managerclubs2: | Helsingborgs Södra BIS |
| Manageryears3: | 2007–2012 |
| Managerclubs3: | Helsingborgs IF (assistant) |
| Manageryears4: | 2012–2014 |
| Managerclubs4: | Örebro SK |
| Manageryears5: | 2014–2015 |
| Managerclubs5: | GAIS |
| Manageryears6: | 2017–2019 |
| Managerclubs6: | Helsingborgs IF |
| Manageryears7: | 2023 |
| Managerclubs7: | Trelleborgs FF |
Per-Ola Ljung (born 7 November 1967[1]) is an unattached Swedish football manager and former player.
Spending most of his career in his native Sweden, Ljung had a trial to forget for English side Watford in 1997. He made one appearance in the Football League Trophy; a 1–0 loss to Fulham.