Citizen-initiated contacts represent an important, yet perplexing, category of political participation. The authors attempt to provide a comprehensive explanation of when and why citizens initiate contacts. They draw from prior research to summarize knowledge about these contacts and the measurement problems that have plagued earlier research. To explore the bases for citizeninitiated contacts, they use survey data on contacts with various municipal departments of the city of Atlanta. Logistic regressions of 15 different types of contacts reveal perceived needs as the most consistently significant predictor of most types. The influence of socioeconomic status over contacting is indirect.Citizen-initiated contacts with government, in which individual citizens contact government personnel with requests for services or complaints, represent an interesting but often puzzling category of political participation. Essentially discovered as a research issue only a quarter century ago, these contacts appear to constitute a substantial and perhaps growing component of citizen involvement with government. Yet, a comprehensive explanation of when and why citizens initiate these contacts has proved elusive, so elusive that one researcher concluded recently that "the study of citizen-initiated contacts stands in a state of serious disarray" (Coulter 1992, 313).