Riccardo Marchizza (born 26 March 1998) is an Italian professional footballer who plays as a centre-back for Serie A club Spezia, on loan from Sassuolo.
Born in Rome in 1998, Marchizza joined A.S. Roma’s youth academy in 2006, at the age of eight.
In July 2016, Marchizza was called up for A.S. Roma’s first team during the pre-season training camp and scored the winning goal in a friendly game against Terek Grozny. On 8 December 2016, Marchizza made his senior debut against Astra Giurgiu on matchday six of the 2016–17 UEFA Europa League group stage; with Roma already advanced, he replaced Emerson in the 89th minute.
In July 2017, Marchizza and Davide Frattesi were signed by Sassuolo for a total fee of €8 million, as part of the deal for Grégoire Defrel. In August 2017, Marchizza was loaned to Serie B club Avellino. On 25 July 2018, Marchizza signed to Crotone on loan until 30 June 2019. On 15 July 2019, he joined Spezia on loan.