卡尚（波斯语：کاشان‎）是伊朗伊斯法罕省的一座城市。

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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 the Kasian, the original inhabitants of the city, whose remains are found at Tapeh Sialk dating back 9,000 years; later this was changed to "Kashian", hence the town name. Between the 12th and the 14th centuries Kashan was an important centre for the production of high quality pottery and tiles. In modern Persian, the word for a tile (kashi) comes from the name of the town.