Sir Thomas Thwaites or Thwaytes (c.1435–1503) was an English civil servant, who was involved in the Perkin Warbeck conspiracy.
Her served as Edward IV's Chancellor of the Exchequer from 1471 to 1483 and Chancellor of the Duchy of Lancaster between 2 April 1478 and 7 July 1483. Upon the ascension of Richard III he was knighted and moved to Treasurer of Calais, where he served from 1483 to 1490.
He owned the manor of Barnes in London.
- Rosemary Horrox (14 March 1991). Richard III: A Study of Service. Cambridge University Press. p. 140. ISBN 978-0-521-40726-7.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- Ian Arthurson (31 March 2013). The Perkin Warbeck Conspiracy 1491-1499. History Press Limited. ISBN 978-0-7524-9563-7.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>