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The House of Holstein-Gottorp, a cadet branch of the Oldenburg dynasty, ruled Sweden between 1751 and 1818, and Norway from 1814 to 1818. The current royal family, Bernadotte, is de jure a branch of the Holstein-Gottorps due to the last Holstein-Gottorp king's adoption of the first Bernadotte king, Charles XIV John.

In 1743, Adolf Frederick of Holstein-Gottorp was elected crown prince of Sweden as a Swedish concession to Russia, a strategy for achieving an acceptable peace after the disastrous war of the same year. He became King of Sweden in 1751.

King Gustav III, Adolf Frederick's eldest son, was enthusiastic that through his great-great-grandmother their dynasty descended from the royal House of Vasa. He expressed wishes that their house be known as Vasa, as the new royal house of Vasa and the continuation of the original. There was no effective way to force this change. Historians have not agreed with Gustav's desires, and the house is always referred to as Holstein-Gottorp.

In 1809, Gustav III's son King Gustav IV Adolf was deposed following the loss of Finland, and the dynasty disappeared from Swedish history with the death of his uncle King Charles XIII in 1818. In 1810, Jean Baptiste Bernadotte (later Charles XIV John), a Marshal of France, was elected crown prince, and became the founder of the next and current Swedish dynasty, the House of Bernadotte.

In 1836, Gustav, the son of the deposed Gustav IV Adolf, was created Prince of Vasa in Austria (written Wasa). However, the use of that name ceased when the prince's only surviving child, his daughter Carola died without children.

The marriage of the future King Gustaf V to Princess Victoria of Baden in 1881 united the ruling House of Bernadotte with a descendant of the House of Holstein-Gottorp since Victoria was a great-granddaughter of the deposed Gustav IV Adolf.

Kings of Sweden

King of Norway

Royal house —House of Holstein-GottorpCadet branch of the House of Oldenburg Preceded byHouse of Hesse Ruling house of the Kingdom of Sweden 1751–1818 Succeeded byHouse of Bernadotte Preceded byHouse of Oldenburg Ruling house of the Kingdom of Norway 1814–1818