Janez Janša (born 17 September 1958) is a Slovenian politician who served three times as a prime minister of Slovenia, a position he had held from 2004 to 2008, from 2012 to 2013, and from 2020 to 2022. Since 1993, Janša has led the Slovenian Democratic Party, which has emerged as the pre-eminent Slovenian conservative party.

Janša served as Minister of Defense from 1990 to 1994, a post he had also held during the Slovenian War of Independence. Janša served as prime minister from 2004 to 2008, and again became prime minister in 2012, following an early election in December 2011. Despite his party winning a plurality of votes in the 2018 Slovenian parliamentary election, Janša was initially passed over as a prime minister. After spending years in opposition, Janša was selected as prime minister-designate in March 2020 following the resignation of Prime Minister Marjan Šarec. His third term as a prime minister ended on 13 May 2022.