Sir John Meux, 1st Baronet (died February 1657) was an English politician who sat in the House of Commons from 1640 to 1643. He supported the Royalist cause in the English Civil War.
Meux was the son of Sir William Meux and his wife Winifred Barrington, daughter of Sir Francis Barrington, 1st Baronet of Barrington Hall, Essex.
In April 1640, Meux was elected Member of Parliament for Newtown in the Short Parliament. He was re-elected MP for Newtown infor the Long Parliament in November 1640 and sat until he was disabled for supporting the King in 1644. He was created baronet of Kingston on 11 December 1641.
Meux was given a fine of £375 in October 1646 by the Committee for Compounding, but it was still unpaid in 1655. IN that year, he was called before the Commissioners for Hampshire to value his estates but did not appear and was ordered to pay £50 a year. In May 1656, he petitioned Parliament asking to be assessed only on an annuity of £100 since the rest of his property had been "conveyed away for debt and to provide for his children". He renewed the petition in November 1656 when it was referred to a committee and the outcome is unknown. He died the following February.
Meux married Elizabeth Worsley, daughter of Sir Richard Worsley, 1st Baronet of Appuldurcombe. He was succeeded by his eldest son William.