Johann Andreas Kneucker (1862-1946) was a German botanical collector who was a native of Wenkheim, a village that today is part of the community of Werbach, Baden-Württemberg.
Until 1923 he was a schoolteacher in Karlsruhe, and afterwards worked as curator of the natural history collection in Baden. During his career he collected plants in southern Europe and northern Africa.
Kneucker specialized in the botanical family Cyperaceae (sedges). He created several exsiccatae collections, and a number of his specimens are now kept in the herbarium at the Staatliches Museum für Naturkunde in Karlsruhe. He was also founder of a magazine of botany called Allgemeinen Botanischen Zeitschrift.