The years immediately after the Glorious Revolution saw the Irish parliament establish itself as an active legislative body. Local government in the country then received something of a fillip, both through legislative action in Dublin, and by reason of the extended period of social and political stability that followed the end of Queen Anne's reign. This essay seeks to outline the responsibilities and functions of the grand jury in Ireland, and thus to establish its position as perhaps the most important component in the governance of provincial Ireland. Further to this it attempts to analyse the social composition of juries through a study of the methods of selection, and the attendant qualification criteria. The available evidence suggests that despite its extensive power and influence, membership of the grand jury was not completely monopolized by the land-owning Anglican elite. Rather, service on the grand jury reached some way down the social scale, and could be undertaken by men from outside the established church. Over time, however, jurors came to be selected from a diminishing pool of candidates : a practice which led to the creation of a largely homogeneous local administrative elite.