| Ji County | |
| Native Name: | 吉县 |
| Native Name Lang: | zh-Hans |
| Postal Code Type: | Postal code |
| Settlement Type: | County |
| Pushpin Map: | China Shanxi |
| Pushpin Label: | Jixian |
| Pushpin Map Caption: | Location of the seat in Shanxi |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Shanxi |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Linfen |
| Area Total Km2: | 1780 |
| Population As Of: | 2013 |
| Population Density Km2: | auto |
| Coor Pinpoint: | Ji County government |
| Coordinates: | 36.0967°N 110.6806°W |
| Timezone: | China Standard |
| Utc Offset: | +8 |
| Population Total: | 110000 |
| Area Footnotes: | [1] |
| Population Footnotes: | [2] |
Ji County, also known by it Chinese name Jixian, is a county in the west of the prefecture-level city of Linfen, in southwestern Shanxi Province, China.[3] [4] The county spans an area of approximately 1,780 square kilometers, and has a population of approximately 110,000 people as of 2013.
Under the Zhou, the area of present-day Ji County was part of the territory of Jin. Its principal town Erqu was the seat of the appenage given to Duke Xian's son Ji Yiwu, who later became known as Duke Hui.
During the Three Kingdoms period, the area belonged to the within the Cao Wei.[5]
The area belonged to the Northern Wei dynasty, undergoing numerous administrative changes during the 5th century. The area then belonged to the Northern Qi and then the Northern Zhou dynasty.
The area belonged to the Sui dynasty upon its establishment in 581 CE, and was incorporated as the Jiyang Commandery . In 584 CE, the Jiyang Commandery was abolished, and was merged into the newly formed .
During the Republic of China, Ji County was established, and placed under the jurisdiction of .
Upon the establishment of the People's Republic of China in 1949, the area was placed under the Linfen Prefecture, which was renamed to the in 1954. The Jinnan Prefecture was abolished in 1970, and Ji County fell under the jurisdiction of the newly formed .
In 2000, the Linfen Prefecture was changed to the prefecture-level city of Linfen.
The county was afflicted by the 2021 China floods, which flooded the Yellow River, destroying buildings throughout the county.[6]
The county spans approximately 1,780 square kilometers in area, bordering Yaodu District and Pu County to its east, Xiangning County to its south, Yichuan County to its west, and Daning County to its north.
The county is located at the southern end of the Lüliang Mountains. The Yellow River flows through Ji County, as well as the Qingshui River, and the . The county is home to the Hukou Waterfall.
Ji County is divided into three towns and five townships. The county government is seated in the town of .
The county's three towns are Jichang,, and .
The county's five townships are,,,, and .