Siena University | 39,550 followers on LinkedIn. Siena University is a learning community advancing the ideals of a liberal arts education, rooted in its identity as a Franciscan and Catholic college. The beautiful, suburban campus is home to 3,000 undergraduates, located in Loudonville, N.Y. , just a few miles outside of the state capitol. We offer 32 majors, as well as 80 plus minor and certificate programs.