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North Warren RSPB reserve is a nature reserve run by the Royal Society for the Protection of Birds (RSPB) in Suffolk, England. It lies on the Suffolk coast on the north edge of the town of Aldeburgh and to the south of Thorpeness and includes the Aldringham Walks area of heathland to the north. It is within the Suffolk Coast and Heaths Area of Outstanding Natural Beauty (AONB) and the Suffolk Heritage Coast area. Noted for its populations of Eurasian bittern, European nightjar and other bird species, it covers a range of coastal habitats and is protected with SSSI, SPA conservation status.