The krona plural: kronor;  is the official currency of Sweden. Both the ISO code "SEK" and currency sign "kr" are in common use; the former precedes or follows the value, the latter usually follows it but, especially in the past, it sometimes preceded the value. In English, the currency is sometimes referred to as the Swedish crown, as krona literally means crown in Swedish. The Swedish krona was the ninth-most traded currency in the world by value in April 2016.

The introduction of the krona, which replaced at par the riksdaler, was a result of the Scandinavian Monetary Union, which came into effect in 1876 and lasted until the beginning of World War I. The parties to the union were the Scandinavian countries, where the name was krona in Sweden and krone in Denmark and Norway, which in English literally means "crown". The three currencies were on the gold standard, with the krona/krone defined as ​1⁄2480 of a kilogram of pure gold.

After dissolution of the monetary union in August 1914, Sweden, Denmark, and Norway all decided to keep the names of their respective and now separate currencies.

20 kronor 120 × 66 mm[16] Purple Astrid Lindgren Småland

A 20-krona banknote (a new denomination) was printed 1991–1995 with a portrait of the writer Selma Lagerlöf and on the reverse was an engraved interpretation of a passage from the book Nils Holgersson's Wonderful Journey Through Sweden. The banknote became invalid after 31 December 2005. A more secure version with the same portrait was printed from 1997–2008 and became invalid after 30 June 2016.

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