Sir John Eyles, 2nd Baronet (1683 – 11 March 1745) of Gidea Hall in Essex, was a British financier and politician who sat in the House of Commons from 1713 to 1734. He was Lord Mayor of London in 1726. He served as a Director of the East India Company 1710-14 and again 1717-21 and was appointed a sub-governor of the South Sea Company in 1721.