Karl Wahlmüller (22 October 1913 in Linz – 16 February 1944 in Toila, Soviet Union)[1] was an Austrian footballer who competed in the 1936 Summer Olympics.

He was part of the Austria national team, which won the silver medal in the football tournament.

[1] He played for SV Urfahr Linz at the time of his Olympic appearance[1] and latterly for LSV Adlerhorst Weis before his death.

[2] He was killed in action serving as corporal in a Luftwaffe field unit on the Eastern Front in 1944 aged 30.

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