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 1153 people and was collected using the F2F method between 12.11 and 21.11. in 2003. The goal was to collect data on citizens' voting behavior and political attitudes before the 2003 parliamentary elections in Croatia (pre-election survey). The survey was conducted as part of the Elections, Parties, and Parliament in Croatia project, funded by the Ministry of Science and Education of the Republic of Croatia.