Oulchy-le-Château is a commune in the Aisne department in Hauts-de-France in northern France.

The town is located about 106 km (66 mi) from Paris, between Soissons to the north and Château-Thierry to the south.

On the night of 2/3 March 1814, the area was taken by imperial troops commanded by Captain Parquin.

The village contains a bakery, supermarket, butcher shops, pharmacy, doctor, nightclub, police, garage and gasoline.

The town contains a football stadium and two tennis courts.