Lehigh, a river of Pennsylvania, rising near Wilkesbarre, Luzerne co., in the N. E. part of the state, and uniting with the Delaware at Easton after a S. S. E. course of about 90 m. In its upper course it is a rapid and picturesque mountain stream, broken by several falls. It passes through a rich coal region, for the products of which it serves as an outlet, having been rendered navigable by a series of extensive improvements as far as Whitehaven, 84 m. from its mouth. It breaks through the Blue Ridge 12 m. below Mauch Chunk.
Lehigh, an E. county of Pennsylvania, bounded N. W. by the Kittatinny or Blue mountains, and S. E. by South mountain, and drained by Lehigh river; area, 389 sq. m.; pop. in 1870, 56,796. It abounds in iron ore, limestone, and clay slate, and has an undulating surface and a fertile soil. The railroads passing through it are the Lehigh Valley, the East Pennsylvania, the Catasauqua and Fogelsville, and the North Pennsylvania. The chief productions in 1870 were 361,209 bushels of wheat, 162,147 of rye, 549,480 of Indian corn, 530,632 of oats, 279,718 of potatoes, 915,818 lbs. of butter, and 38,726 tons of hay. There were 7,816 horses, 11,591 milch cows, 6,847 other cattle, 3,123 sheep, and 17,505 swine; 13 manufactories of agricultural implements, 23 of brick, 35 of carriages, 2 of cars, 1 of refined petroleum, 24 of iron, 10 of lime, 10 of machinery, 13 of roofing materials, 24 of saddlery and harness, 5 of sash, doors, and blinds, 19 of tin, copper, and sheet-iron ware, 34 of chewing and smoking tobacco, 2 of woollen goods, 6 breweries, 24 tanneries, 25 currying establishments, 7 saw mills, and 21 flour mills.