Sangaste is a small borough in Valga County, southern Estonia. It is the administrative centre of Sangaste Parish. Sangaste has a population of 228 (as of 1 January 2010).
Sangaste Castle is an almost exact replica of Windsor Castle in Great Britain. It was designed in 1874 and built 1879–1881. According to legend, it owes its existence to an insult the local count Friedrich Georg Magnus von Berg received in his youth. When attempting to wed a young English lady, her father objected to giving his daughter away to "some Russian savage". Nowadays the castle is administratively located in the nearby Lossiküla village