Arnold Halbach (3 July 1787 in Müngsten, near Remscheid – 16 May 1869 in Baden-Baden) was the Prussian Consul in Philadelphia.
In 1828, the firm "Johann and Caspar Halbach and sons" had to close the plant.
From 1840, he lived in Baden-Baden with his wife Johanna Karoline Mathilde Bohlen (1800-1882).
Their daughter Matilde Halbach (1822-1844) was the mother of Countess Karoline of Wartensleben, grandmother of Leopold IV, Prince of Lippe and a great-great-grandmother of Queen Beatrix of the Netherlands.
Their son Gustav von Bohlen und Halbach (1831-1890) and grandson Gustav Krupp von Bohlen und Halbach (1870-1950) also had a career in the diplomatic service.