Kilmallock (), also known as the Liberties of Kilmallock, is a historical barony in southern County Limerick, Ireland.
Baronies were mainly cadastral rather than administrative units. They acquired modest local taxation and spending functions in the 19th century before being superseded by the Local Government (Ireland) Act 1898.
Kilmallock was owned by the Desmond Geraldines (FitzGeralds). . Land in the Liberties of Kilmallock was granted to Murrough O'Brien, 1st Earl of Inchiquin in 1667. It was originally part of Coshlea before being cut out some time around 1672, although sometimes it was treated as part of Coshlea, as in the 1821 census.
Kilmallock is in the south of the county, between the baronies of Coshma and Coshlea. It is a small area of about , making up just one civil parish, that of St Peter and St Paul.
Settlements within the historical barony of Kilmallock include: