This paper investigates the amount of academic service performed by female versus male faculty. We use 2012 data from an online annual performance reporting system for tenured and tenure-track faculty at two campuses of a large public, Midwestern university as well as 2014 data from a large national survey of faculty at more than 140 institutions. We find evidence in both data sources that women faculty perform significantly more service than men, controlling for rank, race/ethnicity, and field or department. Our analyses suggest that the male-female differential is driven primarily by internal service – i.e., service to the university, campus, or department – rather than external service – i.e., service to the local, national, and international communities.