For other places called Joachimsthal, see Joachimsthal (disambiguation).

Jáchymov (Czech pronunciation:[ˈjaːxɪmof]; German:Thal originally, later Sankt Joachimsthal or Joachimsthal: "Saint Joachim's Valley") is a spa town in north-west Bohemia in the Czech Republic belonging to the Karlovy Vary Region. It is situated at an altitude of 733 m (2,405 ft) above sea level in the eponymous St. Joachim's valley in the Ore Mountains, close to the border to Germany.