Roscommon
an inland county of Connaught, Ireland, called after Comon, a founder of monasteries and schools in the eighth century. The area is 949 square miles. The surface is fertile and is watered by the Shannon river. The plain of Boyle in the center, celebrated for sheep, is full of historical landmarks, and at Croaghon, formerly Rath Cruachain, the ancient burial-place of the kings of Connaught, still stands the pillar stone of King Dathi, killed in the Alps, 428 A. D. Sheep and cattle raising and agriculture are highly developed.
The capital is Roscommon. Pop. about 90,000.