Surat (Gujarati: સુરત), also known as Suryapur, is a commercial city of the Indian state of Gujarat. It is also administrative capital of Surat district and one of the fastest growing cities in India. The city proper is the third cleanest city in India. Surat is Gujarat's second largest city with a population of 4.5 million. Surat ranks fourth in a global study of fastest developing cities conducted by The City Mayors Foundation, an international think tank on urban affairs. It is the fastest growing Indian city in terms of economic prosperity. The city registered an annualised GDP growth rate of 11.5 per cent over the seven fiscal years between 2001 and 2008, according to data compiled by the economic research firm Indicus Analytics.

The city is located 306 km south of state capital Gandhinagar, and is situated on the left bank of the Tapti River (Tapi), the centre being around 22 km (14 mi) from its mouth. A moat divides the older parts of the city, with its narrow streets and handsome houses, and the newer suburbs. The city is largely recognised for its textile and diamond businesses. It is also known as the diamond capital of the world and the textile capital/Manchester textile city of India, a distinction it took over from Ahmedabad. It is also known as the "Embroidery capital of India" with the highest number of embroidery machines than any other city. 92% of the world's diamonds are cut and polished in Surat. It has one of the highest GDP growth rates in India at 11.5% as of 2008. Surat was the primary port of India during the Mughal period, a distinction it lost to Bombay during the late 17th century as the East India Company grew.