Lancang Lahu Autonomous County (simplified Chinese: 澜沧拉祜族自治县; traditional Chinese: 瀾滄拉祜族自治縣; pinyin: Láncāng Lāhùzú Zìzhìxiàn; Lahu: Laq Cha Lad Hof Ceol Ziq Ziq Sheq) is an autonomous county under the jurisdiction of Pu'er City, in southwestern Yunnan province, China.

The Akha language, whose speakers are officially classified as Hani people, is also spoken in Lancang County.

Bulang people are located in:[11] Lancang County is located in southwestern Yunnan below the Tropic of Cancer, spanning latitude 22°01'−23°16' N and longitude 99°29'−100°35' E and an area of 8,807 km2 (3,400 sq mi), making it the second-largest county in the province in terms of area.

It has an international border with Burma's Shan State totaling 80.563 km (50.060 mi) in length.

Rainfall totals about 1,586 mm (62 in) annually, with nearly 70% of it occurring from June to September, when relative humidity averages above 85%.