John Vaughan, 3rd Earl of Lisburne (3 May 1769 – 18 May 1831), known as the Honourable John Vaughan until 1820, was a British soldier and Member of Parliament for Cardigan Boroughs. Lisburne was the younger son of Wilmot Vaughan, 1st Earl of Lisburne. He served in the Army, transferring from the 87th Foot to the 58th Foot as a Captain in 1795, and being promoted to Major the next month and Lieutenant-Colonel later the same year. He eventually achieved the rank of Colonel.