Oldcastle

Oldcastle may refer to:

Places

 * Oldcastle, Bridgend, Wales, a ward
 * Oldcastle, Cheshire, England, a parish
 * Oldcastle, County Meath, Ireland, a town
 * Oldcastle, Monmouthshire, Wales, a village
 * Oldcastle, Ontario, Canada, an unincorporated community

People with the surname

 * Sir John Oldcastle, a supporter of the Lollards in the 15th century
 * Sir John Oldcastle, a play about him

Other uses

 * Oldcastle Revolt, a revolt led by John Oldcastle