Simone Barontini (born 5 January 1999) is an Italian middle distance runner, who specializes in the 800 metres. He has won seven national titles at the senior level.
He participated at one edition of the European Athletics Championships in 2018, and one of the European Athletics Indoor Championships in 2019. He finished eighth at the 2019 European U23 Championships. He gained gold at the 2021 European U23 Championships in Tallinn.
Barontini won nine national championships at individual senior level.