CHATEAU-THIERRY, an arrondissement of the department of the Aisne, in France, extending over 485 square miles. It is divided into five cantons and 127 communes, and contains 57,013 inhabitants. The city which gives its name to the department is situated on the side of a hill upon the right bank of the Marne. It contains 940 houses, with 4160 inhabitants. The chief trade is in wine and corn, and in the making of linen and of serges, with some considerable tanneries. There are near it two mineral springs containing iron. Long. 3. 23. E. Lat. 49. 12. N.