Chyandour (Cornish: Chi an Dowr, meaning "house of the water") is a small settlement within the town of Penzance in west Cornwall, United Kingdom. It is on the north-east edge of the town straddling the A30 trunk road. The Chyandour Brook rises near Carfury and flows into Mount's Bay at Chyandour. Before 1934 Chyandour was in the parish of Madron and was the site of a large tin smelting works.