Kandahar, occasionally Candahar, or Qandahar, (Pashto: کندهار Kandahār) is the second largest city in Afghanistan, with a population of about 512,200 as of 2011. It is the capital of Kandahar Province, located in the south of the country at about 1,005 m (3,297 feet) above sea level. The Arghandab River runs along the west of the city.

Kandahar is the original and most culturally significant city of the Pashtuns and has always been their traditional seat of power. It is a major trading center for sheep, wool, cotton, silk, felt, food grains, fresh and dried fruit, and tobacco. The region produces fine fruits, especially pomegranates and grapes, and the city has plants for canning, drying, and packing fruit. Kandahar has an international airport and extensive road links with Farah and Herat to the west, Kabul and Peshawar to the northeast, Tarinkot to the north, and Quetta in neighboring Balochistan (Pakistan) to the south.

The region around Kandahar is one of the oldest known human settlements. Alexander the Great is said to have laid-out the foundation of what is now Old Kandahar in the 4th century BC and gave it the Ancient Greek name Αλεξάνδρεια Aραχωσίας (Alexandria of Arachosia). Many empires have long fought over the city due to its strategic location along the trade routes of southern, central and western Asia. In 1709, Mirwais Hotak made the region an independent kingdom and turned Kandahar into the first capital of the Hotaki dynasty. In 1747, Ahmad Shah Durrani, founder of the last Afghan empire, made it the capital of modern Afghanistan.