Luise Kähler (12 January 1869 – 22 September 1955) was a German socialist, trade union leader and politician.

She was the daughter of a hackney cab driver with origins in Silesia and received little formal education beyond primary school.

In November 1906, she became the co-founder and first chairwoman of an embryonic union for women working in domestic trades in Hamburg by representing her members against exploitation by private employers and agencies.

In 1913, she became the president of the Union of Domestic Workers of Germany, which required her to move back to her home city of Berlin.

During the First World War, Kähler supported left-wing SPD politicians, that included Clara Zetkin and Rosa Luxemburg in rejecting the party's policy of Burgfrieden (a truce with the government, promising to refrain from any strikes during the war) and attended an international socialist women's anti-war conference in Berlin organised by Zetkin in 1915.

[1] After the war, Berlin and the rest of Germany witnessed a period of politically-driven civil conflict known as the German Revolution during which the imperial government was replaced by the Weimar Republic.

[3] She was amongst the first recipients of the highest civilian honour of the German Democratic Republic, the Order of Karl Marx, which she was awarded in 1953.