The Ashfield Reservoir is a heritage-listed reservoir located at Holden Street, Ashbury, City of Canterbury-Bankstown, New South Wales, Australia. It was designed and built by the Metropolitan Board of Water Supply and Sewerage. It is also known as Ashfield Reservoir (Elevated) (WS 0003) and WS 0003. The property is owned by Sydney Water (State Government). It was added to the New South Wales State Heritage Register on 15 November 2002.