The 2004–05 Croatian First Football League (officially known as the Prva HNL Ožujsko for sponsorship reasons) was the fourteenth 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 23 July 2004 and ended on 28 May 2005. Hajduk Split were the defending champions, having won their seventeenth championship title the previous season, and they defended the title again, after a win against Varteks on 28 May 2005.
Teams
Stadia and personnel
1 On final match day of the season, played on 28 May 2005.
First stage
Rounds 1–22 results
Championship group
Rounds 23–32 results
Relegation group
Rounds 23–32 results
Relegation play-off
First leg
Second leg
Međimurje win 3–1 on aggregate.