Schleiz can be traced back to a settlement established about 1200 ("Altstadt") and a separate "Neustadt" that was established next to it. The "Neustadt" had a castle and a city wall. Until 2 December 1482 they were totally separate communities after which they combined to one city.[citation needed] There was a settlement of the Teutonic Order here, and for some years previous to 1848 the town was the capital of the small principality of Reuss-Schleiz. In the vicinity a battle was fought, between the French and the Prussians on 9 October 1806.[3]
During World War II hundreds of women and men from several nations, including the Soviet Union were transported to Schleiz as forced laborers. At least 60 of them died there.
Kurt Holzschuher (1873-1945), owner of the oldest factory in Schleiz (Gebr. Holzschuher) and German politician (DVP)
Theodor Piegler (1904-1991), great-grandson of H.G. Piegler, co-owner of the internationally active metal goods factory for hairdressing articles "Gebr. Piegler" in Nuremberg
Juergen K. Klimpke (born 1963), mayor of the city of Schleiz from 2012-2018, member of political committees of the city of Schleiz, author ("Schleizer Heimathefte"), founding member and longtime chairman of the "Geschichts- und Heimatverein zu Schleiz e.V." and photographer