| Club: | Lillestrøm |
| Season: | 2009 |
| Manager: | Henning Berg |
| Mgrtitle: | Head coach |
| Chairman: | Per Mathisen |
| Chrtitle: | Chairman |
| Stadium: | Åråsen Stadion |
| League: | Tippeligaen |
| League Result: | 11th |
| Cup1: | Norwegian Cup |
| Cup1 Result: | Fourth round vs Stabæk |
| League Topscorer: | Arild Sundgot (11) |
| Season Topscorer: | Arild Sundgot (11) |
| Highest Attendance: | 10,287 vs Vålerenga 13 April 2009 |
| Lowest Attendance: | 6,334 vs Lyn 4 October 2009 |
| Average Attendance: | 7,602 |
| Prevseason: | 2008 |
| Nextseason: | 2010 |
The 2009 season was Lillestrøm SK's 19th season in the Tippeligaen, and their 34th consecutive season in the top division of Norwegian football.[1]
See main article: 2009 Tippeligaen.
See main article: 2009 Norwegian Football Cup.