Viscount Fermoy was a title in the Peerage of Ireland. The title had a number of creations. Holders of the title, including members of the Roche family of Blackwater Castle in Castletownroche in County Cork, included: Maurice Roche (or De Rupe), sometimes known as "Maurice the mad", is recorded as the 1st (and sometimes 6th) Viscount Fermoy (–1600) David Roche, 2nd (or 7th) Viscount Fermoy (1573–1635) Maurice Roche, 3rd (or 8th) Viscount Fermoy (1597–1670)

See also Baron Fermoy

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