| Long'an County | |
| Other Name: | Lungan |
| Postal Code Type: | Postal code |
| Postal Code: | 5327XX |
| Settlement Type: | County |
| Pushpin Map: | China Guangxi |
| Pushpin Label: | Long'an |
| Pushpin Map Caption: | Location in Guangxi |
| Subdivision Type: | Country |
| Subdivision Name: | China |
| Subdivision Type1: | Autonomous region |
| Subdivision Name1: | Guangxi |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Nanning |
| Subdivision Type3: | Subdivisions |
| Seat Type: | County seat |
| Seat: | Chengxiang |
| Area Footnotes: | [1] |
| Area Total Km2: | 2264.7 |
| Population Footnotes: | [2] |
| Population Total: | 300215 |
| Population As Of: | 2010 |
| Population Density Km2: | auto |
| Coordinates: | 23.166°N 107.696°W |
| Timezone: | China Standard |
| Utc Offset: | +8 |
Long'an County (; Standard Zhuang: Zhuang; Chuang: Lungzanh Yen) is a county of Guangxi Zhuang Autonomous Region, South China, it is under the administration of the prefecture-level city of Nanning, the capital of Guangxi. The westernmost county-level division of Nanning, it borders the prefecture-level cities of Chongzuo to the west and Baise to the northwest.
Long'an County is divided into 6 towns and 4 townships:[3]