This article proposes and tests a model to predict the outcome of representation elections contested by trade union and employee association types of labor organizations in the public sector. The author hypothesizes that the winners of such elections can be predicted from variables measuring individual characteristics of the potential employee voters, such as gender, race, age, seniority, and job level. Application of the model to data on five elections in Michigan predicts four correctly. Qualitative data offers further support for the model, suggesting that employee characteristics and also the length and nature of the election campaigns helped determine the outcome of the elections.