Wilhelm Helfer (26 December 1886 – 15 August 1954) was a German member of the Sturmabteilung (SA), the Nazi Party's paramilitary organization, who became an SA-Obergruppenführer.

Upon the outbreak of the First World War in August 1914, Helfer became an Unteroffizier of the Imperial Schutztruppe for German South West Africa.

[1] Helfer joined the Deutschvölkischer Schutz- und Trutzbund, the largest and most active antisemitic völkisch organization in the Weimar Republic.

With his company, Helfer participated in Adolf Hitler's failed Beer Hall Putsch on 9 November 1923 in Munich, for which he would later be awarded the Blood Order.

After the Party was banned in the wake of the failed coup, he joined a Munich war veterans association, the Frontkriegerbund, became its Gauführer (regional leader) in Upper Bavaria and a member of its Bundesleitung (national leadership).

[3] Also in November, Helfer was elected as a member of the Reichstag from electoral constituency 24 (Upper Bavaria-Swabia), where he served until the fall of the Nazi regime in May 1945.

In September 1942, he also was charged with implementation of air raid protection measures for the Nazi Party building complex in Munich.