St John's Cathedral Catholic Primary School is a primary school based in Portsmouth under the Portsmouth local authority.

St John's Cathedral Catholic Primary School caters for mixed pupils from 3 to 11 years. With 234 pupils enrolled and a capacity of 210, the school provides a structured and balanced curriculum aligned with national expectations.

Ofsted last inspected the school on 12 July 2022, awarding it a Outstanding rating. The report noted positive aspects of leadership, safeguarding and the school’s approach to pupil development.