John Baker (by 1503 – 21 January 1544), of Presteigne, Radnorshire was a Welsh politician.
He was appointed High Sheriff of Radnorshire for 1540–1541 and elected a Member (MP) of the Parliament of England for Radnorshire in 1542.
He also served as a deputy lieutenant and custos rotulorum for the county.
He married Catherine, the daughter of John Bradshaw of Ludlow, Shropshire and had at least 1 son.
This article about a Member of the Parliament of England (before 1707) representing a Welsh constituency is a stub.