OFFENBACH, a city of the grand duchy of Hesse, in Germany, in the province of Darmstadt, and the capital of a bailiwick of the same name. It stands on the river Maine, and is well built, being on one side surrounded with a wall, and on the other with a ditch. It contains 530 houses, with 6950 inhabitants, who are chiefly occupied in making iron and hardware, and a variety of ornamental articles of steel, silver, and gold.