Mistrovství Evropy U21 - kvalifikace 09/04 14:00 1 Itálie U21 v San Marino U21 - View
Mistrovství Evropy U21 - kvalifikace 09/09 14:00 1 San Marino U21 v Turecko U21 - View
Mistrovství Evropy U21 - kvalifikace 10/14 14:00 1 San Marino U21 v Lotyšsko U21 - View

The San Marino national under-21 football team represents the under-21s of San Marino in the UEFA U-21 Championship, and is controlled by the San Marino Football Federation (FSGC, Italian: Federazione Sammarinese Giuoco Calcio), the governing body of football of the state.

San Marino national under-21 football team competed for the first time in the qualifications for the 1990 UEFA European Under-21 Football Championship. Since then they missed two qualifying tournaments (2000 and 2002). Until 2015 qualifying they won only two matches, both by forfeit. In the 2004 qualifying they lost 6–0 to Sweden but UEFA later awarded the match as a 3–0 forfeit win to San Marino due to Sweden including suspended players in their squad. In the preliminary round of the 2007 qualifying they lost 2–1 to Armenia but UEFA also awarded the match as a 3–0 forfeit win for San Marino. In June 2012, they held Greece to a goalless draw in the 2013 qualifying. On 6 September 2013, San Marino recorded their first competitive win 1–0 over Wales at Stadio Olimpico in the 2015 qualifying. This was also the first competitive victory of any San Marino national team since a 2–1 under-17 victory against Andorra in 2002.

Fotbalový tým San Marino U21 je národním mládežnickým fotbalovým týmem San Marina pro hráče do 21 let, který řídí Sanmarinská fotbalová federace. Tým reprezentuje San Marino na mistrovstvích Evropy UEFA do 21 let a dalších mezinárodních soutěžích. Tým ještě nikdy nepostoupil na závěrečný turnaj mistrovství Evropy UEFA do 21 let.