Emmy Kaemmerer (21 May 1890 – 1976) was a German politician, representative of the Social Democratic Party. She also went by the names Elisa Kaemmerer, Emmy de Jäger, Alida de Jäger, Alida Leonhard, and Alida von Leonhard Kämmerer.^[1]

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Kaemmerer was born in Hamburg.^[2]

In 1919–20, she was a member of the Hamburg Parliament.^[2]

She died in Switzerland in 1976.