Reinhold Ferdinand Sahlberg (23 December 1811, Åbo – 18 March 1874, Yläne) was a Finnish naturalist notably specialising in entomology.
In 1827 Reinhold Sahlberg entered, at the age of sixteen, the Imperial Alexander University in Finland where his father taught.
Between 1839 and 1843, he participated as a naturalist in a circumnavigation to Brazil, Chile and then to Sitka in Alaska which returned by Siberia.
The rich collections made by Sahlberg lie today in the Finnish Museum of Natural History and the Swedish Museum of Natural History.
Horn, W. H. R. & Schenkling, S. 1928–1929: Index Litteraturae Entomologicae, Serie I: die Welt-Literatur über die gesamte Entomologie bis inklusive 1863.