Balasagun (Kyrgyz: Баласагун or Баласагын Balasagyn; simplified Chinese: 八剌沙衮; traditional Chinese: 八剌沙袞; pinyin: Bā là shā gǔn) was an ancient Sogdian city in modern-day Kyrgyzstan, located in the Chüy Valley between Bishkek and the Issyk-Kul lake. Located along the Silk Road, the ruins of the city were inscribed in 2014 on the UNESCO World Heritage List as part of the Silk Roads: the Routes Network of Chang'an-Tianshan Corridor World Heritage Site.
Balasagun was founded by the Sogdians, a people of Iranian origin and the Sogdian language was still in use in this town until the 11th century.