Lennart Hartmann (born 3 April 1991) is a German footballer who plays as a midfielder for BFC Preussen II.

Born in Berlin, Hartmann started his professional career with Hertha BSC, making his first appearance on 31 July 2008 in the 2008–09 UEFA Cup first qualifying round second leg against Nistru Otaci.

He made his Bundesliga debut on 17 August 2008 in the opening fixture against Eintracht Frankfurt when he came on in the 67th minute to replace Gojko Kačar.

[1] In January 2011, Hartmann had a trial spell with Canadian club Vancouver Whitecaps.

[3] Failing to make a single appearance in six months, Hartmann left Aachen in January 2012 to join 3.