| Season: | 2008–09 |
| Manager: | Ilija Lončarević (until 26 September 2008) Tomislav Steinbruckner (from 26 September 2008) |
| Mgrtitle: | Manager |
| Chairman: | Mile Dumančić |
| Chrtitle: | Chairman |
| League Result: | 7th |
| Cup1 Result: | First round |
| League Topscorer: | Josip Barišić (8) |
| Season Topscorer: | Josip Barišić (8) |
| Highest Attendance: | 15,000 v Hajduk Split, 5 April 2009 |
| Lowest Attendance: | 1,000 v Šibenik, 26 September 2008 |
| Pattern La1: | _blueshoulders |
| Pattern B1: | _bluestripeonright |
| Leftarm1: | FFFFFF |
| Body1: | FFFFFF |
| Rightarm1: | FFFFFF |
| Shorts1: | 093E96 |
| Socks1: | FFFFFF |
| Pattern La2: | _whiteshoulders |
| Pattern B2: | _whitestripeonright |
| Leftarm2: | 093E96 |
| Body2: | 093E96 |
| Rightarm2: | 093E96 |
| Shorts2: | FFFFFF |
| Socks2: | 093E96 |
NK Osijek entered the into 2008-09 Season defending third position, which is equal to their best position in Prva HNL won six times since Croatian independence. The team decided not to participate in the UEFA Intertoto Cup which would make preparations for the new season harder than usual, as happened two years ago.
To prepare for the Season, NK Osijek played a few friendly matches against 1. FC Kaiserslautern and FC Fehérvár to name a few. The new season will start with the same manager as last year, and with just Milan Pavličić sold from last years starting eleven. As the club's youth academy is one of the best in this part of Europe, several young players are drafted into the first team squad.
Fans and board of directors are hoping that this season can repeat last one, to put NK Osijek into UEFA cups next season.
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| Shirt No. | Player | Apps (Subs) | Goals | YC | RC | |
|---|---|---|---|---|---|---|
| 1 | Marin Skender | 6 | 0 | 0 | 0 | |
| 2 | Dino Gavrić | 4 (2) | 0 | 2 | 0 | |
| 3 | Jurica Pranjić | 0 | 0 | 0 | 0 | |
| 4 | Damir Vuica | 0 | 0 | 0 | 0 | |
| 5 | Matej Vlaović | 0 | 0 | 0 | 0 | |
| 6 | Tomislav Višević | 5 | 0 | 3 | 0 | |
| 7 | Vedran Nikšić | 0 | 0 | 0 | 0 | |
| 8 | Aleksandar Šolić | 4 (2) | 0 | 0 | 0 | |
| 9 | 6 | 2 | 0 | 0 | ||
| 10 | Josip Knežević | 2 (3) | 1 | 1 | 0 | |
| 11 | Antonio Hrnčević | 3 (4) | 0 | 1 | 0 | |
| 12 | Filip Šušnjara | 0 | 0 | 0 | 0 | |
| 13 | 6 | 0 | 1 | 0 | ||
| 14 | Ivica Lončarević | 0 | 0 | 0 | 0 | |
| 15 | Marko Prskalo | 0 | 0 | 0 | 0 | |
| 16 | Goran Todorčev | 1 (1) | 0 | 1 | 0 | |
| 17 | Vedran Jugović | 5 | 0 | 2 | 0 | |
| 18 | Tomislav Šorša | 1 | 0 | 0 | 0 | |
| 19 | Domagoj Vida | 6 | 0 | 2 | 0 | |
| 20 | Diego Barrios | 0 | 0 | 0 | 0 | |
| 21 | Igor Prijić | 0 (2) | 1 | 1 | 0 | |
| 22 | Valentin Babić | 6 | 3 | 3 | 0 | |
| 23 | Srđan Vidaković | 0 | 0 | 0 | 0 | |
| 24 | Ivo Smoje | 6 | 0 | 2 | 0 | |
| 25 | 0 | 0 | 0 | 0 | ||
| 26 | 3 (3) | 2 | 1 | 0 | ||
| 27 | Andre Luiz | 0 | 0 | 0 | 0 | |
| 28 | Domagoj Pušić | 0 (1) | 0 | 0 | 0 | |
| 29 | Josip Barišić | 0 | 0 | 0 | 0 | |
| 30 | Ivan Kardum | 0 | 0 | 0 | 0 | |
| 31 | Ivan Vargić | 0 | 0 | 0 | 0 | |
| Mile Škorić | 2 (2) | 0 | 1 | 0 | ||
| 33 | 7 (3) | 5 | 3 | 0 |
See main article: 2008–09 Croatian First Football League.