Baron Fredrik Wilhelm von Otter (11 April 1833–9 March 1910), Swedish naval officer and politician, Prime Minister of Sweden 1900-1902.

Otter was born on the Fimmersta estate in Westrogothia and belonged to a wealthy and aristocratic family. He entered the Royal Swedish Navy as second lieutenant at the age of 17, but remained without promotion for a long time. Meanwhile he served in the British Royal Navy 1857-1861, participating in campaigns against pirates at the China Sea, and took part in one of Adolf Erik Nordenskiöld's North Pole expeditions in 1868, as commander of the expedition ship Sofia. He was promoted to commander in 1872 and made aide-de-camp of the Crown Prince Oscar, Duke of Ostrogothia the same year and remaining so after his accession to the throne as Oscar II in 1873.

In 1874 he was promoted to captain (kommendör) and appointed minister of the navy in the cabinet, succeding Baron B. A. Leijonhufvud . He remained in this position until the resignation of the De Geer cabinet in 1880, after which he was appointed director of the naval shipyard in Karlskrona. He was made a commodore in 1884, a vice admiral in 1892 and admiral in 1900. He also represented Blekinge County in the parliamentary First Chamber 1891-1899, and Karlskrona in the Second Chamber 1900-1902.

After the resignation of Erik Gustaf Boström in 1900, von Otter was offered the premiership by the king and formed a cabinet which would sit for two years. As Prime Minister he was responsible for carrying through the remodelling of the military system and the final abolishment of the allotment system introduced by Charles XI more than 200 years earlier. In connection with the new military organization, a progressive taxation system was introduced. After the end of that parliamentry session in July 1902, he resigned and was succeeded by his predecessor Boström. He spent his remaining years managing his manor Trantorp outside Karlskrona.

References

• Nordisk familjebok, Vol. 20 (1914), col. 1093 ff