| Lennart Steffensen | |
| Birth Date: | 12 July 1977 |
| Birth Place: | Oslo, Norway |
| Position: | Midfielder |
| Youthclubs3: | Skeid |
| Years1: | 1996–1999 |
| Years2: | 2000 |
| Years3: | 2000–2002 |
| Years4: | 2002 |
| Years5: | 2003–2005 |
| Years6: | 2006–2009 |
| Years7: | 2009–2011 |
| Years8: | 2012–2015 |
| Years9: | 2016 |
| Clubs4: | → Hønefoss (loan) |
| Clubs7: | Hønefoss[1] |
| Clubs8: | Jevnaker |
| Clubs9: | Hønefoss |
| Caps2: | 9 |
| Goals2: | 0 |
| Caps3: | 45 |
| Goals3: | 3 |
| Caps4: | 21 |
| Goals4: | 0 |
| Caps5: | 60 |
| Goals5: | 13 |
| Caps6: | 51 |
| Goals6: | 3 |
| Caps7: | 57 |
| Goals7: | 9 |
| Caps8: | 18 |
| Goals8: | 16 |
| Nationalyears1: | 1999 |
| Nationalteam1: | Norway u-21 |
| Nationalgoals1: | 1 |
| Nationalcaps1: | 0 |
Lennart Steffensen (born 12 July 1977) is a retired Norwegian football midfielder.
He was drafted into the senior squad of Skeid Fotball in late 1996.[2] He played for the Norwegian under-21 team, and ahead of the 2000 season he joined Stabæk Fotball.[3] However, he did not play regularly.[1] As early as August 2000 he was shipped to Vålerenga Fotball.[4] He played there until the spring of 2002, when he was loaned out to Hønefoss BK.[5] The move was made permanent ahead of the 2003 season.[6] Ahead of the 2006 season he went to Notodden FK.[7] In August 2009 he was sold back to Hønefoss BK.[8]
After a lengthy spell in Jevnaker IF, he joined Hønefoss for the third time ahead of the 2016 season.[9] This was his last active season.