As of January 2022, who is is the youngest state leader in the world?

Giacomo Simoncini (born 30 November 1994) is a Sammarinese sports executive and politician and one of the Captains Regent with Francesco Mussoni of San Marino. Their joint terms began on 1 October 2021. He is the youngest state leader in the world, and also is the only head of state under 30 years of age as of 2021.

Simoncini was born and grew up in Borgo Maggiore in San Marino. He graduated in pharmacy and obtained the qualification as a teacher of chemistry. At the age of 18, he enrolled to the Sammarinese Socialist Party, and a year later became a member of the executive board. Following the political elections in 2019, Simoncini became a Member of the Grand and General Council for electoral alliance We for the Republic and is a member of the Council of XII and of Council Commissions.