Zigmantas Balčytis (born 16 November 1953) is a Lithuanian politician who briefly served as acting Prime Minister of Lithuania in 2006.

He took office on 1 June 2006 following the resignation of Algirdas Brazauskas, but failed to be approved by the Parliament to become prime minister.

Balčytis was a member of the Social Democratic Party of Lithuania (LSDP) until 2021 and was Minister of Finance in the Brazauskas government from 2005 to 2007.

[1] On 19 October 2021, Balčytis left the LSDP and joined the newly formed party Union of Democrats "For Lithuania".

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