Viscount Allen, in the County of Kildare, was a title in the Peerage of Ireland.
He was made Baron Allen, of Stillorgan in the County of Dublin, at the same time, also in the Peerage of Ireland.
Lord Allen was also a member of the Irish House of Commons.
His son, the sixth Viscount, fought in the Peninsular War.
Sir Joshua Allen (died 1691), father of the first Viscount, was Lord Mayor of Dublin.