We investigate the voter registration of faculty at 40 leading U.S. universities in the fields of Economics, History, Journalism/Communications, Law, and Psychology. We looked up 7,243 professors and found 3,623 to be registered Democratic and 314 Republican, for an overall D:R ratio of 11.5:1. The D:R ratios for the five fields were: Economics 4.5:1, History 33.5:1, Journalism/Communications 20.0:1, Law 8.6:1, and Psychology 17.4:1. The results indicate that D:R ratios have increased since 2004, and the age profile suggests that in the future they will be even higher. We provide a breakdown by department at each university. The data support the established finding that D:R ratios are highest at the apex of disciplinary pyramids, that is, at the most prestigious departments. We also examine how D:R ratios vary by gender and by region. People interested in ideological diversity or concerned about the errors of leftist outlooks—including students, parents, donors, and taxpayers—might find our results deeply troubling.