Chemnitz, known from 1953 to 1990 as Karl-Marx-Stadt, is the third-largest city in the Free State of Saxony, Germany.

Chemnitz is an independent city which is not part of any county and seat of the government region Direktionsbezirk Chemnitz.

Located in the northern foothills of the Ore Mountains, it is part of the Central German Metropolitan Region. The city's economy is based on the service sector and manufacturing industry.

Chemnitz University of Technology has around 10,000 students.

Chemnitz is named after the river Chemnitz, a small tributary of the Zwickauer Mulde. The word "Chemnitz" is from the Sorbian language (Upper Sorbian: Kamjenica), and means "stony [brook]". The word is composed of the Slavic word kamen meaning "stone" and the feminine suffix -ica. It is known in Czech as Saská Kamenice. There are many other towns named Kamenica or Kamenice in areas with past or present Slavic settlement.

Tourist sights include the Kassberg neighbourhood with 18th and 19th century buildings and the Karl Marx Monument by Lev Kerbel, nicknamed "Nischel" (a Saxon dialect word for head) by the locals. Landmarks include the Old Town Hall with its Renaissance portal (15th century), the castle on the site of the former monastery, and the area around the opera house and the old university. The most conspicuous landmark is the red tower built in the late 12th or early 13th century as part of the city wall.

The Chemnitz petrified forest is located in the courtyard of Kulturkaufhaus Tietz. It is one of the very few in existence, and dates back several million years. Also within the city limits, in the district of Rabenstein, is the smallest castle in Saxony, Rabenstein Castle (Saxony).

The city has changed considerably since German reunification. Most of its industry is now gone and the core of the city has been rebuilt with many small shops as well as huge shopping centres. Many of these shops have well known names, including Zara, H & M, Esprit, Galeria Kaufhof, Leiser Shoes, and Peek & Cloppenburg. The large "Galerie Roter Turm" (Red Tower) shopping centre is very popular with young people.

The Chemnitz Industrial Museum is an Anchor Point of ERIH, the European Route of Industrial Heritage.

The Museum Gunzenhauser, formerly a bank, opened on 1 December 2007. Dr Alfred Gunzenhauser, who lived in Munich, had a collection of some 2,500 pieces of modern art, including many paintings and drawings by Otto Dix, Karl Schmidt-Rottluff and others. The Botanischer Garten Chemnitz is a municipal botanical garden, and the Arktisch-Alpiner Garten der Walter-Meusel-Stiftung is a non-profit garden specializing in arctic and alpine plants.