|Full name||Dan Inge Jörgen Lennartsson|
|Date of birth||10 April 1965|
|Place of birth||Växjö, Sweden|
|1980–1983||Växjö Norra IF|
|1979–1988||Växjö Norra IF (Youth team)|
|1990–1993||Östers IF (U20 coach)|
|1994–1999||Helsingborgs IF (U20 coach)|
|2000–2001||Helsingborgs IF (assistant coach)|
|2005||Sweden U21 (assistant coach)|
|* Senior club appearances and goals counted for the domestic league only|
Lennartsson was born in Växjö. He took over Elfsborg from Magnus Haglund who had been in Elfsborg for 8 years, but moved to be the trainer in Lillestrøm SK. Jörgen had been under Elfsborg's radar for a long time, not only for his achievements with the U-21, the bronze medal in UEFA European Under-21 Football Championship, but mostly for his passion to football and his strong authority and leadership. He has much knowledge about football and experience as a trainer after 20 years at the sideline. His first player to buy was Joackim Jørgensen from Sarpsborg 08 in Norway, a player as he described was much alike Jari Ilola. He played in the Europa League qualification 2012–13 with Elfsborg.
[[File:Jörgen Lennartsson, current football manager of IF Elfsborg.png|thumb|left|Lennartsson at a press conference during his time in charge of the Sweden national U21 team.
Lennartsson is former manager of Stabæk, where he started January 2011. Before Stabæk, he was the manager of the Swedish U21 team after he was held in many positions in various clubs in Sweden, the majority of which were youth coach and assistant manager positions.
On 2 August 2010, Stabæk announced that Lennartson would take over as head coach, and replace Jan Jönsson on 1 January 2011. But only after one season in Stabæk Jörgen had to leave his post as a manager due to Stabæks big economic problems. Before Allsvenskan season 2012 Jörgen signed a four-year contract as a head manager for IF Elfsborg.
On 30 September 2013, IF Elfsborg sacked manager Jörgen Lennartsson. 
- Jörgen Lennartsson at WorldFootball.net
- "Archived copy". Archived from the original on 23 July 2011. Retrieved 5 November 2009.CS1 maint: archived copy as title (link)
- "Lennartsson tar över IFK Göteborg" (in Swedish). IFK Göteborg. 25 November 2014. Retrieved 23 September 2015.