Using data from the 2003 National Survey of College Graduates, this paper examines earnings in the library science labor market and assesses the impact of gender on the income attainment process. We use this cross-sectional dataset to determine if there are significant income differences between male and female library science professionals. The approach taken in this paper is to build a theoretical model of income attainment for librarians. We then discuss the methodology used to analyze the data and test the model, followed by a discussion of the results and recommendations for further research.