KILLALA (pron. Killklla)  , a small town on the north coast of county Mayo, Ireland, in the northern parliamentary division, on the western shore of a fine bay to which it gives name . Pop . (1901), 510 . It is a terminus of a branch of the Midland Great Western railway . Its trade is almost wholly diverted to Ballina on the river Moy, which enters the bay, but Killala is of high antiquarian and historical interest . It was for many centuries a bishop's see, the foundation being attributed to St Patrick in the 5th century, but the diocese was joined with Achonry early in the 17th century and with Tuam in 1833 . The cathedral church of St Patrick is a plain structure of the 17th century . There is a fine souterrain, evidently connected with a rath, or encampment, in the graveyard . A round tower, 84 ft. in height, stands boldly on an isolated eminence . Close to Killala the French under Humbert landed in 1798, being diverted by contrary winds from the Donegal coast . Near the Moy river, south of Killala, are the abbeys of Moyne and Roserk or Rosserick, both Decorated in style, and both possessing fine cloisters . At Rathfran, 2 M .

N., is a Dominican

abbey (1274), and in the neighbourhood are camps, cromlechs, and an inscribed ogham stone, 12 ft. in height . Killala gives name to a Roman Catholic diocese, the seat of which, however, is at Ballina .