Grand Duke Frederick I of Baden (German: Großherzog Friedrich I. von Baden, full name Friedrich Wilhelm Ludwig; Karlsruhe, September 9, 1826 – Mainau, September 28, 1907) was the Grand Duke of Baden between 1856 and 1907. Prince Frederick William came in September 1826 was born as the fourth child and third son of Grand Duke Lipót of Baden and Princess Vilma Zsófia of Sweden. His older brother, Prince Lajos, died as an infant before Frigyes Vilmos was born, so the heir to the throne of Baden became Frigyes Vilmos's other brother, Prince Lajos Jr., who, on the other hand, struggled with mental disorders. 1852. On April 24, after the death of Grand Duke Lipót, the brother of Prince Frederick, II. Louis came to the throne. The government declared him incapable of ruling, and a regent was appointed in the person of his younger brother. Four years later, in 1856 II. Lajos was dismissed in favor of Frigyes. The abdicated ruler himself died two years later, on January 22, 1858, at the age of just thirty-three. I. Grand Duke Frederick professed liberal ideals, the Grand Duke was one of the supporters of the institution of constitutional monarchy. Civil marriages were recognized and introduced in the country during his reign. The rapidly developing city of Mannheim became one of the industrial centers thanks to the development of waterways and railways in its area and the support of industry. The ruler of Baden was also happy to patronize various arts. The founding of the Baden Grand Duke's Art School (Großherzoglich-Badischen Kunstschule) in 1854 is also attributed to the Grand Duke. I. Under Frederick's leadership, the Grand Duchy of Baden joined the North German Confederation in 1871, thus creating the German Empire representing a unified Germany. On September 20, 1856, in Berlin, Grand Duke Frederick I married the daughter of the Prussian ruler, Princess Louisa of Prussia. Three children were born from the relationship: Prince Frigyes (1857–1928), Prince II. Princess Victoria (1862–1930), Grand Duke of Baden under the name of Frederick, by marriage Prince Louis (1865–1888), Queen of Sweden, never married.I. Grand Duke Frigyes died on September 28, 1907 in his summer residence on the island of Mainau. He was succeeded by his elder son, Prince Frederick II. Under the name Frigyes.

Between 1856 and 1907, during the siege of Baden-Durlach by Grand Duke William I., the province's forces were significantly strengthened. The Grand Duke paid special attention to the modernization of the army and devoted considerable resources to the acquisition of new weapons and equipment. The size of the army also increased, and the Grand Duke introduced new military training programs.