In the math department:
 Friday Student Lunch Seminar

You may join the CAM students and faculty for lively discussion and some eating: pizza and soda will be provided to you for free after the 30minute talk.
 The Penn State Math Club

A Penn State student organization, its purpose is to promote the interest of mathematics at Penn State and to aid math students or anyone with an interest in mathematics, and also to promote interaction among math undergraduates, graduates and faculty.
 Penn State SIAM Student Chapter
 Women in Mathematics (female students are welcome to join)
On University Park campus:
 Student Unions and Student Activities, from Student Affairs
 Penn State Graduate Student Association
 Graduate Women in Science at Penn State
 International Student Organizations