Matthias Kollatz (born 24 September 1957) is a German politician of the Social Democratic Party of Germany (SPD) who served as State Minister of Finance in the government of Mayor Michael Müller of Berlin from 2014 to 2021.

Ahead of the 2013 state elections in Hesse, Thorsten Schäfer-Gümbel included him in his shadow cabinet for the SPD campaign to unseat incumbent Volker Bouffier as Minister-President.

From 2014 until 2021, Kollatz served as State Minister of Finance in the government of Mayor Michael Müller of Berlin.

In the negotiations to form a coalition government between the Christian Democratic Union (CDU) and the SPD under the leadership of Kai Wegner following the 2023 state elections, he was part of his party’s delegation to the working group on the state budget and financial policy.

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