Walter Horatio Wilson (15 July 1839 – 28 February 1902) was a lawyer and politician in Queensland, Australia.

[1] Wilson was born at Rhosymedre near Ruabon, Denbighshire, Wales, and arrived in Victoria (Australia) in 1853.

[2] In 1865 he was admitted as a solicitor of the Supreme Court of Queensland, and practised in Brisbane.

Having been called to the Queensland Legislative Council in July 1885, he succeeded T. M. Patterson as Postmaster-General in the Samuel Griffith Government in August 1887, retiring with his colleagues in June 1888.

Wilson was a supporter of Federation and was responsible for the standard of time bill in 1894.