St. Anthony's School is a Catholic preparatory school in Hampstead, London for boys aged 4 to 13, and co-educational nursery for children aged 2.5 to 4.

St. Anthony's was founded in Eastbourne in 1898 by the Patton family. It moved to its current location in Hampstead, London shortly after World War II. In 2023, it was acquired by the Inspired Education Group.

The school occupies a pair of large houses at 90 Fitzjohn's Ave and 1 Arkwright Rd in Hampstead, North London.

The curriculum is based on Roman Catholic teaching. In addition to the core subjects of English, Mathematics, Science and ICT the following subjects are taught from Year 1: French, Mandarin, R.S., Latin, History, Geography, Art, Design Technology. Robotics has also been introduced into the curriculum.

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The school has music provision, sports and clubs, including a debating club. School masses are held once a term at St Mary's Church, Hampstead. There are concerts by visiting musicians and talks by authors, university professors and other professionals.

In 2019 the school was rated "excellent" in all areas by the Independent Schools Inspectorate

• Official website
• Profile on the ISC website