KILLOWER, a parish, in the barony of CLARE, county of GALWAY, and province of CONNAUGHT, 4- miles (W. by N.) from Tuam, on the road from that place to Headford ; containing 828 inhabitants. It comprises a considerable quantity of reclaimable bog. Fairs are held at Castle-Hackett on June 2nd and Oct. 2nd. The principal seats are Castle-Hackett, the residence of Major Kirwan ; Cloonaghmore, of Capt. W. Grest ; and Silane, of Dermot Donelan, Esq. It is a rectory and vicarage, in the diocese of Tuam, forming part of the union of Kilkilvery, or Headford: the tithes amount to £112. 12. 4-. In the R. C. divisions, also, it forms part of the union or district of Headford. About 80 girls are educated in a school entirely supported by Mrs. Kirwan. There are the ruins of a castle at Castle-Hackett.