Ottmar Hofmann (20 September 1835 in Frankfurt am Main – 22 February 1900 in Regensburg) was a German entomologist.He is not to be confused with Ernst Hofmann also an entomologist specialising in Lepidoptera.
Ottmar Hofmann was a physician.
As an entomologist, he worked on Microlepidoptera.
His collection was sold to Thomas de Grey, 6th Baron Walsingham and is now in the Natural History Museum (London).