Both Owen's father and cousin Hugh had been Tory MPs for
Pembroke between 1809 and 1812, with the father also holding
Pembrokeshire between 1812 and 1841. Owen also entered Parliament when he was first elected MP for
Pembroke unopposed at the
1826 general election as a Tory, after which he admitted his youth and experience, and declared support for religious toleration but not Catholic relief. Although he was re-elected numerous times, including as a Conservative in 1832, Owen was often criticised for an "inattention for his parliamentary duties". In Parliament, he voted against the abolition of the Welsh courts, arguing "our sessions should be held in future where they are at present held and, when the bill received
Royal Assent, he signed a memorial expressing regret for it. Owen was also against the parliamentary reform scheme put forward by
Lord Blandford, divided against emancipation and the Galway franchise bill, and presented petitions for the
abolition of slavery. In 1831, he divided against the
Grey ministry's
reform bill and for
Isaac Gascoyne's wrecking amendment, and later divided against a reintroduced version of the former in 1831, and then again upon its second and third readings. He later resigned in 1838 when his father obliged him to vacate the seat for
Sir James Graham, 2nd Baronet. ==1861 Pembrokeshire by-election==