2003–04 Croatian First Football League
The 2003–04 Croatian First Football League was the thirteenth 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 24 July 2003 and ended on 15 May 2004. Dinamo Zagreb were the defending champions, having won their tenth championship title the previous season. Hajduk Split won the title, after a win against Varteks on 15 May 2004.
Teams
Stadia and personnel
| Team | Manager1 | Location | Stadium | Capacity |
| Cibalia |  Davor Mladina | Vinkovci | Stadion HNK Cibalia | 9,920 |
| Dinamo Zagreb | Nikola Jurčević | Zagreb | Stadion Maksimir | 37,168 |
| Hajduk Split | Petar Nadoveza | Split | Stadion Poljud | 35,000 |
| Inter Zaprešić | Srećko Bogdan | Šibenik | Stadion ŠRC Zaprešić | 5,000 |
| Kamen Ingrad | Nenad Gračan | Velika | Stadion Kamen Ingrad | 8,000 |
| Marsonia | Vjekoslav Lokica | Slavonski Brod | Gradski stadion uz Savu | 10,000 |
| Osijek | Branko Karačić | Osijek | Stadion Gradski vrt | 19,500 |
| Rijeka | Ivan Katalinić | Rijeka | Stadion Kantrida | 10,275 |
| Slaven Belupo | Milo Nižetić | Koprivnica | Gradski stadion u Koprivnici | 4,000 |
| Varteks | Miroslav Blažević | Varaždin | Stadion Anđelko Herjavec | 10,800 |
| Zadar | Stanko Mršić | Zadar | Stadion Stanovi | 5,860 |
| NK Zagreb | Mile Petković | Zagreb | Stadion Kranjčevićeva | 8,850 |
- 1 On final match day of the season, played on 15 May 2004.
First stage