Brigadier General Thomas Stanwix (1670 – 14 March 1725) was a British Army officer, politician and Governor of Gibraltar.
Stanwix joined the Army and had become a Captain-Lieutenant in Hasting's Foot Regiment by 1692. In March 1702 he was elected Member of Parliament for Carlisle. He was appointed Lieutenant-Governor for Carlisle in 1705 and found that his main challenge was stopping the smuggling across the border between England and Scotland.
In 1703, during the War of the Spanish Succession, he was present at the Battle of Caia in Portugal. In 1711 he became Governor of Gibraltar. In 1713 in returned to England and became Mayor of Carlisle as well as Deputy Lieutenant of Cumberland thereby increasing his influence in the Carlisle area. He was a Whig MP who strongly supported Robert Walpole.
He lost his seat in Carlisle and in 1721 instead became MP for Newport and then in 1722 became MP for Yarmouth as well as Governor of Kingston-upon-Hull.
He was also Governor of the Royal Hospital Chelsea from 1714 until 1720.
He died in 1725.