Nogometni klub Olimpija Ljubljana (Slovene pronunciation: [nɔɡɔˈméːtni ˈklúːp ɔˈlìːmpija ljubˈljàːna]; English: Olimpija Ljubljana Football Club), commonly referred to as Olimpija Ljubljana or simply Olimpija, is a professional football club, based in the city of Ljubljana, Slovenia. The club competes in the Slovenian PrvaLiga, the country's highest football division.
Founded on 2 March 2005, under the name NK Bežigrad, Olimpija began competing in the Slovenian fifth division during the 2005–06 season and managed to achieve promotion in four successive seasons, reaching the top division for the first time in 2009 after winning the 2008–09 Slovenian Second League. After seven years in the top division, Olimpija won their first major trophy when they were crowned champions in the 2015–16 season. They won another league title in the 2017–18 season; the same season, Olimpija also won the national cup, completing their first double.
Initially, the club played at the Bežigrad Stadium and the ŽAK Stadium during the club's stay in the second division and during the first year in the top division. In 2010, they moved to the Stožice Stadium with a capacity of 16,038.
Olimpija's nicknames are the "Green and Whites" (Slovene: Zeleno-beli), referring to their primary colours, and "The Dragons" (Slovene: Zmaji), referring to the dragon which is a symbol of Ljubljana and is represented on the city's coat of arms and on the club's crest.