The Wakhan Corridor (Dari: دالان واخان, romanized: Dālān-i Wāxān; Pashto: واخان دهلېز, romanized: Wāxān Dahlez) is a panhandle in the Badakhshan Province of northeastern Afghanistan, encompassing its Wakhan District. This corridor stretches eastward, connecting Afghanistan to Xinjiang, China. It also separates the Gorno-Badakhshan Autonomous Region of Tajikistan in the north from the Khyber Pakhtunkhwa in Pakistan and Gilgit-Baltistan region that is administered by Pakistan in the south. This high mountain valley, which rises to a maximum altitude of 4,923 m (16,152 ft), serves as the source of both the Panj and Pamir rivers, which converge to form the larger Amu Darya River. For countless centuries, a vital trade route has traversed this valley, facilitating the movement of travelers to and from East, South, and Central Asia.

The corridor was formed out of the Wakhan Mirdom after the signing of the 1893 Durand Line Agreement and the 1895 Pamir Boundary Commission protocols, so that the Russian Turkestan dominion, now Tajikistan, would not touch British dominion, now Pakistan. This agreement also created the Durand Line, which today forms the border between Pakistan and Afghanistan. It was previously conquered by Ahmad Shah Durrani of the Durrani Empire in 1763. Its eastern end bordered China's Xinjiang region, then claimed by the Qing dynasty.

The corridor is today the Wakhan District of Badakhshan Province. As of 2024, the district has an estimated population of 18,000 residents. The northern part of the Wakhan, populated by the Wakhi, Pamiri and Kyrgyz peoples, is also referred to as the Pamir. The closest major airport is Fayzabad Airport in the city of Fayzabad to the west, which is accessible by the road network.

At its western entrance, near the Afghan town of Ishkashim, the corridor is 18 km (11 mi) wide. The western third of the corridor varies in width (13–30 km (8–19 mi)) and widens to 65 km (40 mi) in the central Wakhan. At its eastern end, the corridor forks into two prongs that wrap around a salient of Chinese territory, forming the 92 km (57 mi) boundary between the two countries. The Wakhjir Pass on the Afghanistan–China border, which is the easternmost point on the southeastern prong, is about 300 km (190 mi) from Ishkashim. The easternmost point of the northeastern prong is a nameless wilderness about 350 km (220 mi) from Ishkashim. On the Chinese side of the border is the Tashkurgan Tajik Autonomous County of Xinjiang Uyghur Autonomous Region.

The northern border of the corridor is defined by the Pamir River and Lake Zorkul in the west, and the high peaks of the Pamir Mountains in the east. To the north is Tajikistan's Gorno-Badakhshan Autonomous Region. To the south, the corridor is bounded by the high mountains of the Hindu Kush and Karakoram. Along its southern flank, two mountain passes connect the corridor to neighboring regions. The Broghil Pass provides access to Pakistan's Khyber Pakhtunkhwa region, while the Irshad Pass links the corridor to Gilgit-Baltistan. The Dilisang Pass, which also connects to Gilgit-Baltistan, is disused. The easternmost pass, as indicated above, is the Wakhjir Pass, which connects to China and is the only border connection between that country and Afghanistan.

The corridor is higher in the east than in the west; (the Wakhjir Pass is 4,923 m (16,152 ft) in elevation) and descends to about 3,037 m (9,964 ft) at Ishkashim. The Wakhjir River emerges from an ice cave on the Afghan side of the Wakhjir Pass and flows west, joining the Bozai Darya near the village of Bazai Gumbad to form the Wakhan River. The Wakhan River then joins the Pamir River near Qala-i-Panjah to form the Panj River, which then flows out of the Wakhan Corridor at Ishkashim.

The Chinese consider Chalachigu Valley, the valley east of Wakhjir Pass on the Chinese side connecting Taghdumbash Pamir, to be part of the Wakhan Corridor. The high mountain valley is about 100 km (60 mi) long. This valley, through which the Tashkurgan River flows, is generally about 3–5 km (2–3 mi) wide and less than 1 km (0.6 mi) at its narrowest point. This entire valley on the Chinese side is closed to visitors; however, local residents and herders from the area are permitted access.

Although the terrain is extremely rugged, the Corridor was historically used as a trading route between Kabul and Kashgar. It appears that Alexander the Great, Song Yun, Huisheng, Xuanzang, Marco Polo, and many others came this way. The Portuguese Jesuit priest Bento de Goes crossed from the Wakhan to China between 1602 and 1606. The area was visited under the watchful eyes of the Russians by Thomas Edward Gordon in 1874, and in 1891 by Francis Younghusband, followed by Lord Curzon in 1894. While visiting Wakhan in May 1906, Aurel Stein reported that 100 pony loads of goods crossed annually to China.