A branch of the Wogan family was settled at Wiston, four miles north-east of Haverfordwest, by the mid-fourteenth century at the latest.
Like many members of the Welsh gentry, John Wogan was educated at Jesus College, Oxford. The date of his marriage to the daughter of a southern Irish squire is conjectural, but he is unlikely to have remained single for long after he matriculated, as his eldest son was of marriageable age in 1621.
Wogan was too young to stand at the 1604 general election, but he represented his native shire at Westminster in 1614, and in every Parliament thereafter until his death except that of 1624. In that year the seat was snatched from his grasp by Sir James Perrot, and although he complained to the committee for privileges he received scant sympathy, partly because his petition was not received within six weeks of the opening of Parliament but also because the committee disapproved of the tactics he had employed during the election campaign.
On 24 Mar. 1626 the Commons granted Wogan a stay of legal proceedings in which he was involved, but otherwise he made no known impact on the parliaments in which he sat.
