He was born the eldest son of Walter Jones of Headfort and Olivia, the daughter and coheiress of the Hon.
He served three periods as MP for County Leitrim in the Parliament of Ireland, sitting from 1761 to 1768, 1776 to 1783 and 1790 to 1800.
After the Union with Great Britain in 1800 he was MP for Leitrim in the Parliament of the United Kingdom from 1801 to 1802.
Catherine Beresford, daughter of 1st Earl of Tyrone, and widow of Thomas Christmas MP of Whitefield, County Waterford.
[2] They had 3 sons:[3] After Catherine 's death in 1763, he remarried in 1768 to Anne Murray, daughter of Colonel John Murray MP from Monaghan, with whom he had one son and two daughters:[2][3] He served as collector of customs at Dublin Port for a period ending in 1799 however for much of this period he farmed out the position.