|Full name||Mario Varglien|
|Date of birth||26 December 1905|
|Place of birth||Fiume, Austria-Hungary|
|Date of death||11 August 1978(aged 72)|
|Place of death||Florence, Italy|
|Height||1.76 m (5 ft 9 in)|
|* Senior club appearances and goals counted for the domestic league only|
Mario Varglien (Italian pronunciation: [ˈmaːrjo ˈvarʎen]; 26 December 1905 – 11 August 1978), also known as Varglien I, was an Italian football player and manager born in Fiume (today Rijeka), who played as a midfielder.
Varglien played club football with Juventus for most of his career, winning five Serie A championships, and also serving as the team's captain.
At international level, Varglien was also part of the Italian national football team which won the 1934 FIFA World Cup.
Mario's brother, Giovanni Varglien also played football in Italy and with the Italian national team; the two brothers played at Juventus together.