Baron Fredrik von Essen (30 July 1831 – 3 October 1921) was a Swedish politician, friherre, Marshal of the Realm and lord of Kavlås Castle.

Von Essen was member of the House of knights and nobility in the Riksdag of the Estates 1862–1863 and 1865–1866, and member of the Riksdag's first chamber (Första kammaren) 1867–1874 and 1877–1906.

In 1894 he was appointed Marshal of the Realm by King Oscar II and served until 1911.

He was chairman of the Executive Committee for the Swedish Iron-Clad Fellowship.

[1] He married Ebba Aurora Brahe (1838–1924), daughter of Count Nils Fredrik Brahe (1812–1850) and Countess Hedvig Elisabet Maria Amalia Piper, at Skokloster Castle 14 July 1859.