Slievardagh (Irish: Sliabh Ardach) is a barony in County Tipperary, Ireland.
Baronies were created after the Norman invasion of Ireland as divisions of counties and were used the administration of justice and the raising of revenue.
While baronies continue to be officially defined units, they have been administratively obsolete since 1898.
In many cases, a barony corresponds to an earlier Gaelic túath which had submitted to the Crown.
However, the neighbouring barony of Kilnamanagh was split into Upper and Lower half-baronies, being allocated to the north and south ridings respectively.