Sir John Talbot Dillwyn-Llewelyn, 1st Baronet (26 May 1836 – 6 July 1927) was a British Conservative Member of Parliament who was notable for his links to Welsh sports.

Unusually for a Conservative candidate he held meetings in nonconformist chapels, including one at Zoar, Ystalyfera which was said to have been well attended by the working men of the district.

[citation needed] In 1889 he was elected as one of the first members of Glamorgan County Council and was immediately made an alderman, to which role he was re-elected in 1895.

He was created a baronet, 'of Penllergaer in Llangyfelach and of Ynys-y-gerwn in Cadoxton juxta Neath both in the County of Glamorgan', on 20 March 1890.

[citation needed] Llewelyn died in 1927 aged 91 and was buried with his wife and next to his father in St David's Church in Penllergaer.