Shillelagh () is a barony in County Wicklow, Ireland.
Shillelagh barony derives its name from the SÃÂol Elaigh, a local people who claimed descent from ÃÂlothach mac Fáelchon, and from the village of Shillelagh.
Shillelagh barony is located in southwest County Wicklow.
Derived from SÃÂol Elaigh, meaning descendants of Ealach. O'Dunlaing (O'Dowling) was noted as a chief of SÃÂl n-Elathaig, a branch of the SÃÂl Mella. The Ua Tuathail (O'Tooles) were driven here in the late 12th century, following the Cambro-Norman invasion. The territory was also controlled by the ÃÂ GaoithÃÂn (O'Gahans) for a period
Below is a list of settlements in Shillelagh barony: