Thomas Poynings, 1st Baron Poynings (1512? - 1545) was an English soldier and courtier.
He was one of the three illegitimate sons of Sir Edward Poynings of Westenhanger, Kent, England. He married Katherine, daughter of John, 2nd Lord Marney and the widow of George Ratcliffe sometime before 1539.
Katherine inherited land in the west country and Poynings began to acquire additional land in Wiltshire, Cornwall and Somerset, as well as exchanging Westenhanger for a grant of monastic land in Dorset (including Bindon Abbey). In the 1540s, he served King Henry VIII as Marshal of Calais and keeper of the castle at Guînes, then took an active role in the invasion of France in 1544, in particular at Montreuil and the sieges of Boulogne.
On 30 January 1545, Poynings was raised to the peerage as Baron Poynings and appointed Lieutenant of Boulogne. He died at Boulogne on 17 August 1545.