Kargilik County (Uyghur: قاغىلىق ناھىيىسى), also known as Yecheng County (Chinese: 叶城县), is a county in southwest of the Xinjiang Uyghur Autonomous Region and is under the administration of the Kashgar Prefecture. It contains an area of 28,600 km². To the north, the county borders Makit County. To the east, the county borders Guma County (Pishan) in Hotan Prefecture. To the west, the county borders Yarkant County, Poskam County and Taxkorgan Tajik Autonomous County. In the south, the county has a border of more than 80 km (50 mi) with Pakistan and India administered areas of Kashmir.

In 1975, future Chinese Communist Party Deputy Committee Secretary of the Xinjiang Uyghur Autonomous Region Zhu Hailun was sent to Kargilik County in the Down to the Countryside Movement.

The northern part of the county is in the Taklamakan Desert and the southern part of the county is in the Kunlun Mountains. Mazar Pass is located in the southern part of the county.

Kargilik County contains 6 towns and 15 townships.

Kargilik County's economy is based on agriculture and animal husbandry. Agricultural products include wheat, corn and cotton, as well as pomegranates, yellow pears, walnuts, and dried apricots. Industries include construction, machinery, electronics, and food processing. The county is known for the 'Kargilik Banximao Sheep' (叶城半细毛羊).

In 1997, Uyghurs made up 93% of the population of the county and Han Chinese made up 6% of the population.

As of 2015, 490,417 of the 519,962 residents of the county were Uyghur, 23,408 were Han Chinese and 6,137 were from other ethnic groups.

As of 2018^[update], Uyghurs made up 91% of the population of the county.