- Sanna Marin
- 34:24 year(s):day(s)
- Finland ()
The youngest serving prime minister is 34 years 24 days old, and was achieved by Sanna Marin (Finland) when she assumed office on 10 December 2019.
Sanna Marin was previously the transport minister for the Social Democratic Party of Finland and will lead a five-party coalition government, with four out of the five party leaders still being in their thirties.