Fereydunshahr (Persian: فریدونشهر, Georgian: მარტყოფი) is a city in and the capital of Fereydunshahr County, Isfahan Province, Iran. At the 2006 census, its population was 13,475, in 3,622 families.
Fereydunshahr is situated inside the Zagros mountain range. It has one of the country's largest population of ethnic Georgians (ფერეიდნელი). People from Fereydunshahr speak a Georgian dialect along with Persian. The Georgian alphabet is also used.