The 2005–06 Croatian First Football League was the fifteenth season of the Croatian First Football League, the national championship for men's association football teams in Croatia, since its establishment in 1992. The season started on 20 July 2005 and ended on 13 May 2006. Hajduk Split were the defending champions, having won their eighteenth championship title the previous season. Dinamo Zagreb won the title, after a win against Osijek on 6 May 2006, which started his eleventh year dominance.
HNL 2005/06
Sezona 2005/06 Prve hrvatske nogometne lige igrala se s 12 klubova. Prvak je bio Dinamo Zagreb. Najbolji strijelac sezone bio je Eduardo da Silva s 34 golova za Dinamo Zagreb. Hrvatski nogometni kup osvojio je Rijeka.