DIP Chairman Branko Hrvatin told a news conference on Monday that voters could submit requests for amending or correcting voters' registers until 2 June.
Members of minorities who turn 18 at the day of elections will also have the right to vote.
Candidacies to run in the elections are to be submitted until the midnight of 28 May.
A total of 308 councils are to be elected.
Of this number, 73 councils are in counties and the City of Zagreb, 128 councils are in cities and 107 in municipalities.
In addition, the Croatian government has called elections for 228 representatives of ethnic minorities. Of them 86 are in counties and the City of Zagreb and 78 in other cities plus 64 representatives in municipalities.
In response to questions from the City of Zagreb, the DIP issued a statement saying that Croatian citizens whose ethnicity is Muslim can vote and can run for the election of councils of the Bosniak minority in local of self-government units.