Decies-without-Drum (/ˈdeɪʃə/; Irish: Na Déise lasmuigh den Drom[1]) is a barony in County Waterford, Ireland.

Decies-without-Drum is located in the centre of County Waterford, including the coast between Dungarvin and Dunbrattin Head.

[6] Déisi Muman were an ancient Gaelic Irish tribe that occupied this territory; their name means "Vassals of Mumu."

[7] Drumlohan Souterrain and Ogham Stones is an important historic site (AD 400–900).

[6] Various branches of the Power / La Poer family owned land in the region before the Cromwellian settlement.