Aisne contains the administrative territorial entity Château-Thierry
Principal towns
The department of Aisne includes one medium-sized city (Saint-Quentin) and three small cities (Laon, Soissons and Château-Thierry) to which may be added the conglomeration formed by Chauny and Tergnier. There are many other agglomerations of an urban character because Aisne has been densely populated since before the 19th century. The villages are numerous and rather small. The most populous commune is Saint-Quentin; the prefecture Laon is the third-most populous. As of 2019, there are 7 communes with more than 10,000 inhabitants:
See also: List of the communes of the Aisne department.
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