James George Membrey (23 March 1862 – 12 November 1940) was an Australian politician.
He was born in Buninyong to storekeeper James Membrey and Mary Anne Hadley, but he grew up in Napoleons and Ballarat.
On 27 April 1886 he married Elizabeth Pearse Carvosse, with whom he had five children.
Although he was a Liberal, he opposed Thomas Bent's government in 1908.
He served as a minister without portfolio from 1914 to 1917, when he left parliament.