Tomislav Tomašević (pronounced [tǒmislaʋ tomǎːʃeʋitɕ]; born 13 January 1982) is a Croatian politician, activist, environmentalist and political scientist who has served as the 53rd mayor of Zagreb since 2021.

He ran for mayor of Zagreb in the 2021 local elections and defeated right-wing candidate Miroslav Škoro in the second round, by a margin of 64% to 34%.

Tomašević was born in 1982 in Zagreb, SR Croatia, Yugoslavia to mother Ivanka and father Smiljan.

He and his brother Tihomir grew up in Zapruđe and later in Zaprešić as young family moved before his returning to Zagreb.

[4] At the age of 16, as a young environmental protection activist Tomašević joined non-governmental organization Green Action.

[10] Tomašević was among the elected councilors from the coalition, and was a vocal critic of Mayor Milan Bandić in the Assembly.

[16] In this elections, the Tomašević's father, Smiljan, was a candidate at the Homeland Movement list for the Zagreb Assembly.

[29] Within the first two months of appointment Tomislav Tomašević faced allegations by media and mostly right wing opposition of compromising his pre-election promises, corruption and investigations due to appointment of medical business owner Tomislav Lauc as the head of the Srebrnjak hospital who was sympathiser and small donor *(less than 2000 USD) of his party, as well as partial renewing of the contract of the city of Zagreb (due to lack of alternatives) with the notorious C.I.O.S Group[30] owned by Petar Pripuz despite promise not to.

[31] On 3 July 2021, Tomašević attended the 20th annual Zagreb Pride, alongside other Croatian politicians such as Social Democratic Party president Peđa Grbin and Deputy Prime Minister Boris Milošević.