Léon Joseph Semmeling (4 January 1940 – 14 March 2024) was a Belgian footballer who played as a midfielder for Standard Liège.

He earned 35 caps for the Belgium national team, and participated in the 1970 FIFA World Cup and UEFA Euro 1972.

Semmeling died on 14 March 2024, at the age of 84.

[1] Standard Liege Belgium

This biographical article related to association football in Belgium, about a midfielder, is a stub.