HNL) was the 19th season of Croatia's second level football competition since its establishment in 1992.
Istra 1961 were league champions and were promoted to Prva HNL at the end of the previous season.
(As of 9 July 2009, two out of the 16 clubs which were supposed to take part in 2.
HNL failed to meet UEFA competition requirements and were refused licences.
The top scorers in the 2009–10 Druga HNL season were:[1]