Merryfield (alias Merrifield, Murefeld, Merefeld, Muryfield, Merifield, Wadham's Castle, etc.) is a historic estate in the parish of Ilton, near Ilminster in Somerset, England. It was the principal seat of the Wadham family, and was called by Prince (d. 1723) their "noble moated seat of Meryfeild" (sic). The mansion house was demolished in 1618 by Sir John Wyndham (1558–1645), of Orchard Wyndham, a nephew and co-heir of Nicholas II Wadham (1531–1609), co-founder of Wadham College, Oxford, the last in the senior male line of the Wadham family. It bears no relation to the present large 19th-century grade II listed mansion known as Merryfield House, formerly the vicarage, immediately south of St Peter's Church, Ilton.