William Archer (10 February 1831 – 6 July 1925) was an English-born Australian politician.
He was born in London to John and Eliza Archer, and was a pageboy at Kensington Palace before joining the navy.
He then returned to New South Wales and became a horse trader at Clarendon, then joining an ironmongers' company in the 1860s and finally becoming a railway contractor.
During the 1890 maritime strike he contracted to the government from the Mount Kembla coal mine.
Archer was a member of the New South Wales Legislative Assembly from 1898 to 1904, representing Burwood; he was generally an independent member, although he had some dealings with both the Free Trade and Progressive parties.