Karen Margrethe "Kamma" Rahbek, née Heger (19 October 1775 – 21 January 1829) was a Danish writer, salonist and lady of letters.

She received a broad based education and could speak several languages including German, French, Spanish, Latin, Greek and Italian.

[2] Her salon at Bakkehuset became a cultural centre and the gathering place for the writers of the Danish Golden age and was considered the salon of the middle class in contrast to the more aristocratic Friederike Brun and Charlotte Schimmelmann.

Other notable visitors included Jens Baggesen, Sophie Ørsted, Poul Martin Møller, N. F. S. Grundtvig, B. S. Ingemann, H. C. Andersen, Peter Oluf Brøndsted and Johan Ludvig Heiberg.

Rahbek befriended the writers of the Romantic style, while her spouse preferred the moralists.