William Byron, 3rd Baron Byron (1636 – 13 November 1695) was an English nobleman, peer, politician, and a poet.
He succeeded to the title of 3rd Baron Byron in 1679 upon the death of his father.
Lord Byron married the Hon.
They had five sons, but the first four died in infancy: Lord Byron married Elizabeth Stonhouse, daughter of Sir George Stonhouse, 3rd Bt.
She married Arthur Cole, 1st Baron Ranelagh; they had no children.