Lewis Jones (c. 1560 – 2 November 1646), was a Welsh priest, who joined the Church of Ireland in 1606, and became Bishop of Killaloe in 1633.

Irish historian James Ware claimed he was called "the vivacious Bishop of Killaloe" for having married a young wife at the age of threescore (60).

His Puritan leanings were deplored by Archbishop Laud, but he remained in office until his death in 1646 at the reputed age of 104.

Several writers[4][5] believe Jones graduated from Brasenose College in 1580, which would correspond to a date given for his age in a letter of Archbishop Laud and make him about 86 at his death.

On the other hand, the story of Jones as "the vivacious Bishop" given by James Ware and his editor Walter Harris – in a work supposedly printed by Jones' granddaughters – would argue for the earlier date of graduation.