Ottawa University (OU) is a private Baptist university with its main campus in Ottawa, Kansas. It also has a second residential campus in Surprise, Arizona, and adult campuses in the Kansas City and Milwaukee metropolitan areas, as well as online. It was founded in 1865 and is affiliated with the Ottawa Tribe of Oklahoma and the American Baptist Churches USA. The residential campus in Ottawa has a student enrollment of more than 875 students, while the OUAZ campus in Surprise has more than 900.