Illinois has open primaries. In a primary election, you must select one political party ballot to vote or request a non-partisan ballot (public questions only) if available. You have the freedom to change your party choice in each primary election. In a primary election, a voter must declare a party affiliation at the polling place to receive a ballot. Each party’s slate of candidates is listed on a separate ballot, and a voter may select only one ballot. Illinois voters do not register by political party or declare a political party membership. However, voters must declare their party affiliation in order to receive the party ballot for which they would like to vote in a primary election; voters may request any party and may change parties from one primary to the next.