Greiz ( ; ) is a town in the state of Thuringia, Germany, and is the capital of the district of Greiz. Greiz is situated in eastern Thuringia, east of the state capital Erfurt, on the White Elster river.

Greiz has a large park in its centre (Fürstlich Greizer Park) which is classified as an English garden. Thomasstraße, Burgstraße, Marktstraße,