St Bonaventure's, known informally as St Bon's, is a voluntary-aided Catholic secondary school for boys aged 11–16 in Forest Gate, London Borough of Newham, England, with a mixed gender 6th Form for 16–18-year-old students It is under the trustee-ship of the Roman Catholic Diocese of Brentwood. St Bonaventure's is the oldest boys' school in Newham, having been established in the West Ham area of Essex by the Franciscan order in 1875, following the Roman Catholic Relief Act 1829. The school was established in its current location in 1877.