Kashan (Persian: کاشان‎‎, also Romanized as Kāshān; also known as Kachan) is a city in and the capital of Kashan County, in the province of Isfahan, Iran. At the 2006 census, its population was 248,789, in 67,464 families.The etymology of the city name comes from Kasian, the original inhabitants of the city, whose remains are found at Tapeh Sialk dating back 9,000 years; later this changed to Kashian, hence the town name.