Yiliang County, subordinate to Kunming City, Yunnan Province, is located in the central part of Yunnan Province, between 24 ° 30 ′ 36 "- 25 ° 17 ′ 02" north latitude and 102 ° 58 ′ 22 "- 103 ° 28 ′ 75" east longitude. It borders Luliang County and Shilin Yi Autonomous County in the east, Mile City and Huaning County in the south, Chengjiang City, Chenggong District and Guandu District in the west, and Songming County in the north. The county seat is 52 kilometers away from Kunming downtown, 24 kilometers away from Shilin National Scenic Spot and 38 kilometers away from Jiuxiang Scenic Spot. Yiliang County has jurisdiction over 3 streets (including the entrusted Tangchi Street), 4 towns and 2 townships, covering an area of 1913.53 square kilometers. According to the data of the seventh population census, as of 0:00 on November 1, 2020, the permanent population of Yiliang County was 384875.

Most areas in Yiliang County are between 1500 and 1800 meters above sea level. The terrain is high in the north and low in the south. The climate belongs to the north subtropical monsoon climate. The annual average temperature is 16.3 ℃. The rivers in Yiliang County belong to the Xijiang River system of the Pearl River basin. In November 2018, it was listed in the "2018 China's Happy 100 Counties List".

Yiliang County, founded in the Western Han Dynasty, is a major agricultural county in the suburbs of Kunming City. It is known as the granary in central Yunnan, the water town in the flower town, and the town of roast duck. Its main tourist attractions include Jiuxiang scenic spot, Yanquan scenic spot, etc., and has successively won the title of the city of flowers and seedlings in China. In 2021, Yiliang County's gross domestic product (GDP current price) will be 22.65 billion yuan, up 5.5% year-on-year (comparable price).