Mervyn Archdall may refer to:
Mervyn Archdall (Irish antiquary) (1723–1791) Mervyn Archdall (senior) (c. 1724–1813), colonel and MP for Fermanagh Mervyn Archdall (junior) (1763–1839), general and MP for Fermanagh Mervyn Edward Archdale (1812–1895), High Sheriff (1879) and MP for Fermanagh Mervyn Archdall (bishop) (1831–1913), Bishop of Killaloe and Clonfert