Chilas is a city in Pakistani-administered Gilgit–Baltistan in the disputed Kashmir region. It is the divisional capital of Diamer Division and is located on the Indus River. It is part of the Silk Road, connected by the Karakoram Highway and N-90 National Highway to Islamabad and Peshawar in the southwest, via Hazara and Malakand divisions of Khyber Pakhtunkhwa. To the north, Chilas connects to the cities of Tashkurgan and Kashgar in Xinjiang, China, via Gilgit, Aliabad, Sust, and the Khunjerab Pass.

Diamer District, also spelled Diamir District,) is a district in the Gilgit-Baltistan region administered by Pakistan. The headquarters of the district is the town of Chilas. The district is bounded on the north by the Tangir and the Gilgit districts, on the east by the Astore District, on the south by the Mansehra district of Pakistan's Khyber Pakhtunkhwa Province and the Neelum District of Azad Kashmir, and on the west by the Upper Kohistan District of Khyber Pakhtunkhwa Province. The Karakoram Highway passes through Diamer District.