St Peter's College is one of the constituent colleges of the University of Oxford. Located on New Inn Hall Street, Oxford, United Kingdom, it occupies the site of two of the university's medieval halls dating back to at least the 14th century. The modern college was founded by Francis James Chavasse, former Bishop of Liverpool, opened as St Peter's Hall in 1929, and achieved full collegiate status as St Peter's College in 1961. Founded as a men's college, it has been coeducational since 1979.

The University of Oxford has thirty-nine colleges, and four permanent private halls (PPHs) of religious foundation. Colleges and PPHs are autonomous self-governing corporations within the university. These colleges are not only houses of residence, but have substantial responsibility for teaching undergraduate students. Generally tutorials and classes are the responsibility of colleges, while lectures, examinations, laboratories, and the central library are run by the university. Students normally have most of their tutorials in their own college, but often have a couple of modules taught at other colleges or even at faculties and departments. Most colleges take both graduates and undergraduates, but several are for graduates only.