CHATEAUDUN, an arrondissement of the department of the Eure and Loire, in France, extending over 576 square miles, divided into five cantons and ninety-one communes, and containing 53,994 inhabitants. The chief city, of the same name, is situated on a rising ground on the banks of the Loire. It has a fine market-place, and a castle from which the prospect is most delightful. It contains 925 houses, and 6161 inhabitants, who make woollen blankets, and some thin stuffs. Long. 0. 18. 59. E. Lat. 48. 4. 12. N.