In the 1991 census, the settlement had equal numbers of Serbs and Croatians, but during the Croatian War of Independence the Croatian Serbs largely left the town, and only part of them returned later in the 1990s.
In the 2001 census, the municipality had 7,523 inhabitants, with the following ethnic makeup:[3]
Directly elected minority councils and representatives are tasked with consulting tasks for the local or regional authorities in which they are advocating for minority rights and interests, integration into public life and participation in the management of local affairs.[4] At the 2023 Croatian national minorities councils and representatives electionsCzechs, Hungarians, Roma and Serbs of Croatia each fulfilled legal requirements to elect their own 15 members minority council of the Town of Grubišno Polje with Serb community electing 14 members into their council.[5]