Lieutenant General William George Harris, 2nd Baron Harris KCH (19 January 1782 – 30 May 1845) was a British soldier and peer.
Harris was the son of General George Harris, 1st Baron Harris.
He fought under his father during the siege and capture of Seringapatam in 1799 at the age of 17. He later became a Lieutenant-General in the British Army and commanded the 73rd Regiment of Foot at the Battle of Waterloo in 1815.
He was given the colonelcy of the 86th Foot from 1832 to 1835 and the 73rd Foot from 1835 to his death.
Lord Harris died in May 1845, aged 63. He had married Isabella Helana Handcock-Temple of Waterstown, Co. Westmeath on 28 May 1824. She was obliged by a previous will to continue the Temple name. William George Harris moved into Waterstown House after the wedding. He was succeeded in the barony by his son George.
His great-grandson is Michael Marriott