| Competition: | Nemzeti Bajnokság II |
| Season: | 2009–10 |
| Winners: | Siófok (West) Szolnok (East) |
| Promoted: | Siófok (West) Szolnok (East) |
| Relegated: | Zalaegerszeg II (West) Hévíz (West) Baktalórántháza (East) |
| Prevseason: | 2008–09 |
| Nextseason: | 2010–11 |
| Updated: | 15 July 2010 |
The 2009–10 Nemzeti Bajnokság II was Hungary's the 59th season of the Nemzeti Bajnokság II, the second tier of the Hungarian football league system.[1]