Thomas Calston (c. 1361 – 1418), of Littlecote, Wiltshire, was an English landowner and politician.
He was a Member (MP) of the Parliament of England for Marlborough in January 1390 and for Wiltshire in 1402 and 1406.
He was the son and heir of Laurence Calston of Littlecote and his wife Felicity Combe.
He inherited Littlecote and other Wiltshire property from his father, and further land in Wiltshire, Hampshire and Dorset on the death of his great-uncle Sir Laurence St Martin.
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