The Wahroonga Reservoir is a heritage-listed reservoir located at 1678 Pacific Highway and Woonona Avenue in the Sydney suburb of Wahroonga in the Ku-ring-gai Council local government area of New South Wales, Australia. It was designed and built by the Metropolitan Board of Water Supply and Sewerage in 1915. It is also known as Wahroonga Reservoir (Elevated) . The property is owned by Sydney Water