Hieronymus Theodor Richter (21 November 1824 – 25 September 1898) was a German chemist.

In 1863, while working at the Freiberg University of Mining and Technology, he co-discovered indium with Ferdinand Reich.

He then worked for the Freiberg Hüttenwerken, since 1853 as a metallurgist chemist.

[3] He died September 25, 1898, in Freiberg, Saxony, at the age of 73.

In 1865, the mineral Richterite was named in honour of Hieronymous Theodor Richter.