Sir John Byron Junior (ca. 1526 – 1600) was an Elizabethan English knight.
He was the son of Sir John Byron Sr and lived at Clayton, Manchester, and later Royton, both then in Lancashire[1] and later still at Newstead Abbey in Nottinghamshire.
He was High Sheriff of Lancashire in 1572 and was knighted by Queen Elizabeth I of England in 1579.
His eldest son was John Byron, 1st Baron Byron but he had several other sons. Their heirs inherited the title from the first baron.[2] One of his daughters was married to Sir Thomas Hutchinson of Owthorpe, Nottinghamshire