The Liechtenstein national under-21 football team represents the under-21s of Liechtenstein in the UEFA U-21 Championship, and is controlled by the Liechtenstein Football Association, the governing body of football in Liechtenstein. On 5 October 2022, it was announced that this team would be dissolved for 2023 and 2024, and would return in time for the UEFA U21-Championship 2027 qualification campaign. This decision was made due to the fact that most of the higher quality players in this age category would end up playing for the senior team.

Liechtensteins U21-landslag i fotball er det nasjonale U21-landslaget i fotball for Liechtenstein, og representerer landet i internasjonale U21-fotballturneringer, som U21-EM i fotball. De kontrolleres av Liechtensteins fotballforbund.