Thomas Gresham, English merchant and financier (b. 1519)
Sir Thomas Gresham the Elder (; c. 1519 – 21 November 1579), was an English merchant and financier who acted on behalf of King Edward VI (1547–1553) and Edward's half-sisters, queens Mary I (1553–1558) and Elizabeth I (1558–1603).

In 1565 Gresham founded the Royal Exchange in the City of London.