Greiz is a town in Thuringia, and it is the capital of the district of Greiz. Greiz is situated in eastern Thuringia on the river White Elster.

Greiz has a large park in its center (Fürstlich Greizer Park) which is classified as an English garden. Thomasstraße, Burgstraße, Marktstraße, Waldstraße, and Leonhardtstraße with their Jugendstil houses are well known examples of that architectural style. Prof.-Dr.-Friedrich-Schneider-Straße 4 is one of the earliest examples of Art Deco architecture (built in 1911).

In addition to a chemical works and a disused paper factory there are mechanical engineering operations, plastics manufacturing businesses, wood machining enterprises, medical technology, suppliers to the automobile industry, printing houses and breweries. In recent years various high tech businesses (sensor technology, climate simulators, micro-chip production) and environmental technology companies developed.