Rikkyo University (立教大学, Rikkyō daigaku), also known as Saint Paul's University, is a private university, in Ikebukuro, Tokyo, Japan. Rikkyo is one of the five MARCH universities, the group of private universities in the Kanto region, together with Meiji, Aoyama Gakuin, Chuo, and Hosei.

Rikkyo is known as one of the six leading universities in the field of sports in Tokyo (東京六大学 "Big Six" — Rikkyo University, University of Tokyo, Keio University, Waseda University, Meiji University, and Hosei University).

A leading liberal arts teaching and research institution, the university is the largest Anglican Christian affiliated university in Japan.

The university is internationally oriented and involved in numerous international programmes and projects. Rikkyo maintains contact with more than 140 educational institutions abroad for the purpose of exchanging lecturers, students and projects. With more than 700 students from outside Japan, the institution has 20,000 students, and 2,700 teachers and staff members.