The three Secretaries General were Sir James Eric Drummond from Britain (1920-1933), Joseph Avenol from France (1933-1940), and Sean Lester from Ireland (1940-1946).
Am Ganzen hat d'Organisatioun dräi Generalsekretären: den Englänner James Eric Drummond (1920-1933), de Fransous Joseph Avenol (1933-1940) an den Ir Seán Lester (1940-1946).