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.

[3] Also in 1716, he was appointed one of the commissioners to oversee estates forfeited to the Crown during the unsuccessful Jacobite rising of 1715, a post he held until 1725.

[3] He was also appointed president of St. Thomas's Hospital in 1737, and Joint Postmaster-General in 1739, holding both posts for the rest of his life.

[5] Eyles purchased the estate of Gidea Hall, in Havering, demolished the old mansion there in 1720, and built a new "elegant" house.

[6] In 1731, Eyles was the dedicatee of George Lillo's tragedy The London Merchant, a play later excerpted in French by Abbé Prévost who had served as Sir John's secretary and tutor to his son Francis.