Longford, an inland county of the province of Leinster, Ireland, to the east of Lough Ree and the upper Shannon, having a length of 29 miles, a width of 20 miles, and containing 421 square miles. The surface is generally level, with low hills, interspersed with bogs, and is fertile. About one-half is grass land, and the arable portion produces oats and potatoes. There are several small lakes, and the chief rivers are the Camlin and Tuny, while the Royal Canal also passes through. 'There is some marble-quarrying; but the chief industries are the manufacture of linen and coarse woollens, and the making of butter. On the islands of Lough Ree are some interesting remains of monasteries. The county returns two members to Parliament. Longford, the county town, is 76 miles N.W. of Dublin.