Sir William Patrick Manning (18 November 1845 – 20 April 1915) was an Australian politician.
Born at Darlinghurst to baker John Manning and Margaret Harrocks, he worked as a financier and had extensive business interests. Around 1867 he married Honorah Torpy in Sydney, with whom he had eight children. He was a Sydney City alderman from 1887 to 1900 and mayor from 1891 to 1894, in which year he was knighted. From 1893 to 1894 he was a member of the New South Wales Legislative Assembly, representing South Sydney. Manning died at Rose Bay in 1915.[1]