John Leahy (15 July 1854 – 20 January 1909) was a Newspaper proprietor and member of the Queensland Legislative Assembly. Leahy was born at Schull, Cork, to Patrick Leahy, farmer, and his wife Mary (née Coghlan). After receiving his education he moved to Queensland where he was said to have worked as a rural labourer before becoming postmaster at Windorah then settling in Thargomindah. It was here that Leahy held a partnership in a cordial factory and, with his brother Patrick, became part-owner of the Thargomindah Herald. From 1886 until 1889 he was also the proprietor of the Royal Hotel which was located in the main street of the town.