In June 2007
Igor Štimac, president of Association of Prva HNL clubs, proposed a future expansion of Prva HNL from 12 to 16 clubs, starting from 2008–09 season. However, although a majority of club representatives supported that proposal, no strict agreement or final decision was made. On
HNS meeting in late August 2007 it was decided to postpone the decision for late 2007 or even 2008 and that the expansion would not be possible before the 2009–10 season. For more than a year nothing explicit was stated on that matter. Finally, on a regular HNS meeting in February 2009 HNS Secretary Zorislav Srebrić stated that club licensing would decide whether the 2009–10 season would feature 12 or 16 teams. Theoretically, if only 15 teams obtained Prva HNL license, league would have featured 12 teams. The deadline for submitting the license was 1 May 2009. On 8 May 2009 HNS declared that all 19 clubs that applied for the license were awarded with it and would be in possibility to enter the league in 2009–10, now expanded to 16 clubs. Also, on 26 May 2009 HNS received official confirmations from all 19 clubs in which they expressed their will to compete in next year's Prva HNL, what means that none of the clubs would withdraw from the league. However, despite their guarantee to compete in Prva HNL,
Slavonac eventually withdrew although they finished fourth and earned direct access to
2009–10 Prva HNL. Their place was taken by
Međimurje while sixth-placed
Hrvatski Dragovoljac competed in a relegation play-offs. == Stadiums and locations ==