Lieoux is a commune in the Haute-Garonne department in southwestern France.

[3] Until the end of 1973 Lieoux was a commune in its own right, but on 1 January 1974 it was merged with the commune of Saint-Gaudens.

[4] It became a separate commune again on 13 February 2008.

[5] Population data refer to the commune in its geography as of January 2023.

This Haute-Garonne geographical article is a stub.