Samuel Genersich (February 15, 1768 – September 2, 1844) was a Carpathian German physician and botanist from Kežmarok.
He was the son of Christian Genersich, merchant in Kežmarok, and his wife Anna Susanna née Royko.
He practiced medicine for six years in Kežmarok, and was subsequently appointed municipal physician in Levoča.
Kitaibel's herbarium at the Hungarian National Museum in Budapest contains many plants collected by Genersich.
The genus Genersichia (Cyperaceae) was named for him by János Heuffel, as was Dianthus genersichii Gyorffy (Caryophyllaceae).