Thomas Bulkeley, 1st Viscount Bulkeley (1585-1659), was a landowner from North Wales who supported the Royalist cause during the English Civil War.
The son of Sir Richard Bulkeley of Beaumaris, Thomas Bulkeley was a colonel in the Royalist army and was created Viscount Bulkeley of Cashel in the Irish peerage in 1644. A staunch supporter of King Charles I of England, he is said to have invited the king to take up residence at his home, Baron Hill. He was succeeded by his son Robert.