The 2023–24 NK Osijek season was the club's 110th season in existence and the 33rd consecutive season in the top flight of Croatian football.

This was the first season for Osijek to play their home matches on the newly built Opus Arena.

[1] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.

Total Spending: €600,000 Total Income: €6,200,000 Net Income: €5,600,000 Last updated: 26 May 2024 Source: Soccerway Last updated: 26 May 2024.