This is an account of the veneration of Insular saints as found in the kalendars of surviving Irish Sarum antiphonals and breviaries from the fourteenth and fifteenth centuries. In accordance with a number of Dublin episcopal constitutions, these kalendars reflect the devotional practices of their users through the inclusion of Irish saints, ranging from those of national significance to a growing number of diocesan and more local figures. In addition, the presence of non-Sarum English saints reflects the regional practices of Anglo-Norman settlers from different parts of England, notably the West Country (Chester, Bristol), as well as connections with Canterbury, Winchester, London, and East Anglia. Comparison of these sources reveals how patterns of devotion could vary between English communities in Ireland and those that were more mixed or perhaps predominantly Irish, according to which saints were included in the kalendars, and how they were ranked.