The złoty (alternatively zloty; Polish: [ˈzwɔtɨ] (listen); abbreviation: zł; code: PLN) is the official currency and legal tender of Poland. It is subdivided into 100 grosz (gr). It is the most traded currency in Central and Eastern Europe and ranks 21st most-traded in the foreign exchange market.

The word złoty is a masculine form of the Polish adjective 'golden', which closely relates with its name to the guilder whereas the grosz subunit was based on the groschen, cognate to the English word groat. It was officially introduced to replace its predecessor, the Polish marka, on 28 February 1919 and began circulation in 1924. The only body permitted to manufacture or mint złoty coins is Mennica Polska, founded in Warsaw on 10 February 1766.

As a result of inflation in the early 1990s, the currency underwent redenomination. Thus, on 1 January 1995, 10,000 old złoty (PLZ) became one new złoty (PLN). Since then, the currency has been relatively stable, with an exchange rate fluctuating between 4 and 5 złoty for a euro. As a member of the European Union, Poland is obligated to adopt the euro when all specific conditions are met, however there is no time limit for fulfilling all of them.