Gertrud Lodahl (28 January 1878 – 17 March 1930) was a German newspaper and magazine editor and politician. In 1919 she became a member of the Weimar National Assembly, remaining a member of parliament until the following year.

Lodahl was born into a working-class family in Berlin in 1878. After leaving school she worked as a nanny and then in the book printing industry.^[1] She joined a trade union and the Social Democratic Party (SPD) around 1895. In 1895 she also became a member of the board of directors of the Berlin Book Printing Association and subsequently edited newspapers and magazines for the SPD, trade unions and cooperatives. During World War I she sat on the advisory board of the War Food Office and was involved with the Price Inspection Office.^[1]

Although she was not elected to the Weimar National Assembly in the January 1919 elections, she entered the Assembly in February 1919 as a replacement for Paul Stössel and remained a member until the 1920 Reichstag elections.^[2][3] She died in 1930.