| 2009–10 KBL season | |
| League: | Korean Basketball League |
| Sport: | Basketball |
| Duration: | October 15, 2009 – April 11, 2010 |
| Tv: | KBS, MBC-ESPN, SBS Sports, OBS, MBC-LIFE |
| Season: | Regular Season |
| Season Champs: | Ulsan Mobis Phoebus |
| Mvp: |  Ham Ji-hoon (Mobis) |
| Top Scorer: |  Greg Stevenson (LG) |
| Finals: | Finals |
| Finals Link: | Korean Basketball League#Results |
| Finals Champ: | Ulsan Mobis Phoebus |
| Finals Runner-Up: | Jeonju KCC Egis |
| Finals Mvp: | Ham Ji-hoon (Mobis) |
| Finals Mvp Link: | Korean Basketball League#Results |
| Seasonslist: | List of KBL seasons |
| Seasonslistnames: | KBL |
| Prevseason Link: | 2008–09 KBL season |
| Prevseason Year: | 2008–09 |
| Nextseason Link: | 2010–11 KBL season |
| Nextseason Year: | 2010–11 |
The 2009–10 KCC Professional Basketball season was the 14th season of the Korean Basketball League.
| width=3% | RK | width=20% | Team | width=5% | G | width=5% | W | width=5% | L | width=6% | PCT | width=4% | GB | width=9% | Tiebreaker |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Ulsan Mobis Phoebus | 54 | 40 | 14 | 0.741 | – | 3–3, +48 | ||||||||
| 2 | Busan KT Sonicboom | 54 | 40 | 14 | 0.741 | – | 3–3, –48 | ||||||||
| 3 | Jeonju KCC Egis | 54 | 35 | 19 | 0.648 | 5 | – | ||||||||
| 4 | Changwon LG Sakers | 54 | 34 | 20 | 0.630 | 6 | – | ||||||||
| 5 | Wonju Dongbu Promy | 54 | 33 | 21 | 0.611 | 7 | – | ||||||||
| 6 | Seoul Samsung Thunders | 54 | 26 | 28 | 0.481 | 14 | – | ||||||||
| 7 | Seoul SK Knights | 54 | 16 | 38 | 0.296 | 24 | 4–2 | ||||||||
| 8 | Anyang KT&G Kites | 54 | 16 | 38 | 0.296 | 24 | 2–4 | ||||||||
| 9 | Incheon ET Land Elephants | 54 | 15 | 39 | 0.278 | 25 | 4–2 | ||||||||
| 10 | Daegu Orions | 54 | 15 | 39 | 0.278 | 25 | 2–4 |
KRW 200,000,000 (champions + regular-season 1st place)
KRW 80,000,000 (runners-up + regular-season 3rd place)
KRW 50,000,000 (regular-season 2nd place)