Felix Slavik (3 May 1912 – 6 October 1980 ) was an Austrian politician who served as mayor and governor of Vienna from 1973 to 1984 as a member of the Social Democratic Party.

He joined the Social Democrats (SPÖ) in 1926 and continued working for them even after the party was banned during the Austrofascist era.

When members of the group were arrested in November 1939, the Gestapo also took notice of Slavik, and he was accused of treason.

[3] Slavik served as mayor until 1973, when he resigned after receiving only two-thirds of the vote in the SPÖ Vienna leadership election.

His defeat was partly due to his strong support for the losing side in a referendum on the development of Sternwartepark in Währing.