Sagua County is subordinate to Xigaze City of Tibet Autonomous Region, located in the southwest of the Tibet Autonomous Region, the northwest of Xigaze City, located in the northern foot of the Himalayas and the southwest edge of the south Gangdise Mountains. It is one of the border counties. The border of the county is 105 kilometers long, and it is the center of the three western counties of Xigaze City (Zhongba, Sagua, Jilong), bordering Ongren County and Nyalam County in the east. It borders Jilong County and Nepal in the south, Zhongba County in the west, and Cuoqin County in Ngari Region in the north. Upper Brahmaputra River. The territory of the "219" national road across the county east and west, but also Lhasa to Alipland traffic arteries. The total area of the county is 12,400 square kilometers, with jurisdiction over seven townships, one town and 38 administrative villages. The county average elevation of 4600 meters above sea level, the climate is harsh, typical of the high climate. County people's government in Jiajia Town. According to the seventh census data, as of midnight on November 1, 2020, the permanent population of Saga County was 16,220.

In 2020, the GDP of Saga County reached 580 million yuan, a year-on-year growth of 10.8 percent.
On December 9, 2019, the People's Government of the Tibet Autonomous Region approved Saga County's withdrawal from the poverty-stricken county (district).