Karl Christian Sigismund Bernhardi (5 October 1799, Ottrau – 1 August 1874, Kassel) was a German librarian and politician.
In 1834 he co-founded the Anstalt zur Erziehung armer und verwahrloster Knaben, an institution that dealt with the education of underprivileged youth.
He was an editor of the liberal newspaper Der Verfassungsfreund, and in 1834 was co-founder of the Vereins für hessische Geschichte und Landeskunde (Association for Hessian history and regional studies).
[2][1] In 1844 he published a "language map" of Germany, Sprachkarte von Deutschland (2nd edition, 1849 with Wilhelm Stricker) — a work that helped spark interest in the linguistic study of German dialects.
[3] His other noteworthy publications include: Bernhardi was the author of numerous articles in the Allgemeine Deutsche Biographie.