​HIRSON, a town of northern France in the department of Aisne, 35 m. by rail N.E. of Laon, on the Oise. Pop. (1906) 8335. It occupies an important strategic position close to the point of intersection of several railway lines, and not far from the Belgian frontier. For its defence there are a permanent fort and two batteries, near the railway junction. The town carries on the manufacture of glass bottles, tiles, iron and tin goods, wool-spinning and brewing.