Sir James Hamlyn Williams, 3rd Baronet (25 November 1790 – 10 October 1861) was a Welsh politician.
At the 1831 UK general election, he followed his father and grandfather in standing in Carmarthenshire.
He won the seat as a Whig, but lost it at the 1832 UK general election.
In Parliament, he called for the immediate abolition of slavery, and for the removal of taxes on various staple goods.
[1][2] In later life, Hamlyn Williams focused his time on hunting, becoming honorary gamekeeper for Caio, Mallaine and Talley, and also became the Sheriff of Carmarthenshire.