The development of mass partisanship and party identification in post-Soviet societies is a controversial subject of scholarly research. One prevalent view argues that post-Soviet citizens are distrustful of parties and that it will take generations for party identification to appear in these societies. Others argue that partisanship is emerging as a result of citizens perceiving meaningful differences between the parties. If party identification is forming, partisanship should be relatively stable across time at the individual level. This study takes a rare look at 1999 panel data from Ukraine to determine the degree of partisan stability. The findings demonstrate that meaningful party identification appears to be emerging for a significant proportion of the population due to political information and this partisanship is influencing election decision making among Ukrainian voters.