| Common Name: | Karl-Marx-Stadt |
| Conventional Long Name: | District of Karl-Marx-Stadt |
| Native Name: | Bezirk Karl-Marx-Stadt |
| Subdivision: | District (Bezirk) |
| Nation: | East Germany |
| Image Map Caption: | Location of Bezirk Karl-Marx-Stadt within the German Democratic Republic |
| Capital: | Karl-Marx-Stadt |
| Stat Area1: | 6009 |
| Stat Pop1: | 1,859,500 |
| Stat Year1: | 1989 |
| P1: | Saxony (1945–1952) |
| Flag P1: | Flag of Saxony.svg |
| S1: | Saxony |
| Flag S1: | Flag of Saxony.svg |
| Year Start: | 1952 |
| Year End: | 1990 |
| Today: | Germany |
The Bezirk Karl-Marx-Stadt, also known as Bezirk Chemnitz, was a district (Bezirk) of East Germany. The district would last from 1952 up to the Reunification of Germany in 1990. The administrative seat and the main town was Karl-Marx-Stadt, renamed back to Chemnitz during the reunification of Germany.
The Chemnitz District (renamed, with the city, after Karl Marx on 10 May 1953) was established, with the other 13, on 25 July 1952, substituting the old German states. After 3 October 1990, it was disestablished due to the German reunification, its territory becoming again part of the state of Saxony.
The Bezirk Karl-Marx-Stadt, corresponded to the area of the actual Direktionsbezirk Chemnitz and the southernmost one of DDR, bordered with the Bezirke of Gera, Leipzig and Dresden. It bordered also with Czechoslovakia and West German Upper Franconia.
The Bezirk was divided into 26 Kreise: 5 urban districts (Stadtkreise) and 21 rural districts (Landkreise):