Gymnasium Kadaň is a Czech regional gymnasium in the Ústí nad Labem Region of Kadaň. Gymnasium is the oldest school in Kadaň and fifth oldest in Ústí nad Labem Region.

The school was established in 1803 with 99 students and continued under the control of the Piarists until 1823. The institute of Gymnasium was then reestablished in 1872 in a new building. The Gymnasium was again closed in 1951 by communist education reform. A new Gymnasium was established in 1958.