Thomas Wynn, 1st Baron Newborough

Thomas Wynn, 1st Baron Newborough (1736 – 12 October 1807), known as Sir Thomas Wynn, 3rd Baronet, from 1773 to 1776, was a British Member of Parliament.

Wynn was the son of Sir John Wynn, 2nd Baronet. He sat as a Member of Parliament for Carnarvonshire from 1761 to 1774, for St Ives from 1775 to 1780 and for Beaumaris from 1796 to 1807 and also served as Lord Lieutenant of Carnarvonshire between 1761 and 1781. Wynn succeeded his father in the baronetcy in 1773 and in 1776 he was raised to the Peerage of Ireland as Baron Newborough, of Newborough.

Lord Newborough married, firstly, Catherine, daughter of John Perceval, 2nd Earl of Egmont, in 1766. After her death in 1782 he married, secondly, Maria Stella Petronilla, daughter of Lorenzo Chiappini, in 1786. There were children from both marriages. Lord Newborough died in October 1807 and was succeeded in his titles by his eldest son from his second marriage, Thomas. Lady Newborough later remarried and died in 1843.