Säter is a locality and the seat of Säter Municipality, Dalarna County, Sweden, with 4,429 inhabitants in 2010.
Säter is, despite its small population, for historical reasons normally still referred to as a city. Statistics Sweden, however, only counts localities with more than 10,000 inhabitants as cities.
At the location was a royal mansion named Säter's Royal Mansion.
Sweden's first copper mint was built at the location in 1624, influenced by its proximity to the copper mountain at Falun with its tannery that had been located to Säter a few years earlier.
The town Säter was founded in 1630, and much of its old town today has still kept wooden houses and street structure from that time, which few Swedish cities have. One of the oldest houses is the city hall.
On 8 May 1642, the town was chartered by Queen Christina of Sweden, making it one of the Cities in Sweden. The chosen coat of arms depicted a miner.
The Säter hospital was opened in 1912 and was at the time Sweden's largest mental hospital. The serial killer Thomas Quick was admitted there for a short while earning him the nickname "the Säter man".
The following sports clubs are located in Säter:
The ITU Long Distance Triathlon World Championships has been held in Säter twice.
Säter has a railway station along the Dala Railway with trains to Mora, Falun, Arlanda Airport and Stockholm. Suitable airports for travelling to or from Säter are Borlänge Airport (20 km distance) and Arlanda Airport (177 km).
International relations 
Twin towns — Sister cities 
Säter is twinned with: Joutseno, Finland