The data were collected from a representative sample of adult citizens (over 18 years old) of the Republic of Croatia via multistage stratified simple random sampling. The sample comprised 2608 people and was collected using the F2F method in April 1990. The goal was to collect data on citizens' voting behavior and political attitudes before the 1990 parliamentary elections in Croatia (pre-election survey). The survey was conducted as part of the Elections, Parties and Parliament in Croatia: 1990 - 2000 project.