Otto Garlepp (20 August 1864, Cörmigk – 25 November 1959, Köthen), was a Germannaturalist and with his brother Gustav Garlepp (1862–1907) a professional collector.
The brothers Otto Garlepp and Gustav Garlepp are honoured in the butterfly name Papilio garleppi, the bird name Compsospiza garleppi the mammal name Garlepp's mouse, a subspecies of the Pampas cat and another of Darwin's Rhea amongst many others. They were professional collectors in South America from 1883. At first Gustav worked alone, arriving in Brazil where there were many people of German descent ("Deutschbrasilianer") to collect insects for Dresden Zoological Museum. Gustav returned to Germany in 1892 following 4 years in Peru, a short trip to Germany and then an expedition to Bolivia. He returned to Bolivia in 1893 with his wife and Otto. He visited Germany for the last time in 1900 when he demonstrated 600 Neotropical bird species at a meeting of the Deutsche Ornithologen-Gesellschaft in Leipzig.Gustav Garlepp settled in Paraguay in 1901. He was murdered there in 1907. Otto returned to Germany in 1911. He married Elise Ida Schulz in Germany and the couple returned to South America. Otto's collecting ceased in 1913.