Gerhard Adolf Janensch (24 April 1860, Zamborst – 2 February 1933, Berlin) was a German sculptor and medailleur.
At the age of seventeen, he entered the Prussian Academy of Arts, where he studied under Fritz Schaper, Albert Wolff and Paul Thumann.
The following year, he joined the German Artists' Association and received a stipendium to study in Rome for his work "Bacchant mit Panthern".
In 1892, he succeeded Wolff as head of the modelling class and was named a full member of the Academy in 1897.
The figure of a blacksmith that Janensch made for display at the Great Berlin Art Exhibition [de] in 1897 later became Stock's tomb sculpture.