Lebanon, city (1990 pop. 24,800), seat of Lebanon co., SE Pa., in the Pennsylvania Dutch farm country; founded 1753, inc. as a city 1868. Its manufactures include fabricated metal products, lumber, apparel, machinery, tools, textiles, fertilizers, and processed foods. Grain, soybeans, and apples are grown, and livestock is raised. Lebanon was a flourishing town before 1790, and early 18th-century German religious groups are still represented there. The city has a historical museum, and horse shows are a local feature. Also in the area are the Cornwall Furnace (operated 1742–1883) and the Union Canal tunnel, a civil-engineering landmark.