Miguel Mieg Alonso (29 September 1896 – 19 April 1981), was a Spanish footballer who played as a midfielder for Athletic Club de Madrid.

[1][2] A historical member of Athletic Madrid in the late 1910s, he was one of the first footballers to play for them for his entire career, and thus to be part of the so-called one-club men group.

In the tournament, he formed a great partnership with the team's captain José María Castell and fellow Athletic teammate Sócrates Quintana in the midfield, and despite being a weaker Madrid side than in the previous tournaments, they managed to win the cup for the first time in the team's history after beating Catalonia in the decisive game, with Mieg scoring the opening goal in a 2–0 win, thus contributing decisively in the capital side's triumph.

Another facet of his activity was an altruistic dedication to institutions such as the Civil Hospital of Santiago or the School of Arts and Crafts of Vitoria.

Mieg's access pavilion to the Santa Isabel cemetery, a work of which he was proud, can be considered as the masterpiece of the architecture of classical style in the city of Vitoria.