BALTINGLASS, a town of Ireland, county of Wicklow, on the river Slaney, 37 miles S.S.W. of Dublin. It formerly carried on a manufacture of linen and woollen cloths, but its trade is now confined to bleaching. Here an action took place in 1798 between the royalists and the insurgents, in which the latter were defeated. It has the remains of an ancient Cistercian abbey and a castle. Before the Union it returned two members to the Irish parliament. Pop. in 1851, 1572.