| Kaiyuan | |
| Other Name: | K'ai-yüan |
| Settlement Type: | County-level city |
| Pushpin Map: | Liaoning |
| Pushpin Map Caption: | Location of the city centre in Liaoning |
| Coordinates: | 42.546°N 124.038°W |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Liaoning |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Tieling |
| Subdivision Type3: | Township-level divisions |
| Seat Type: | Municipal seat |
| Unit Pref: | Metric |
| Area Total Km2: | 2813.3 |
| Area Urban Km2: | 150.39 |
| Area Footnotes: | [1] |
| Population Density Km2: | auto |
| Population Total: | 600000 |
| Population As Of: | 2017 |
| Population Urban: | 212900 |
| Timezone1: | China Standard |
| Utc Offset1: | +8 |
| Postal Code Type: | Postal code |
| Postal Code: | 112300 |
| Area Code: | 0024 |
Kaiyuan is a county-level city in the northeast of Liaoning, People's Republic of China, bordering Jilin for a small section to the north. It is under the administration of Tieling City, the centre of which lies to the southwest.
There are 3 subdistricts, 9 towns, and 9 townships under the city's administration.[2]
Subdistricts:
Towns:
Townships:
Kaiyuan is situated in northeastern Liaoning in the southeastern part of Tieling City on the eastern bank of the middle reaches of the Liao River. It borders Dongfeng County and Qingyuan Manchu Autonomous County to the east, Tieling County to the south, Faku and Changtu counties to the west, and Lishu County (Jilin) to the north. Its administrative area reaches a maximal north–south extent of 86km (53miles) and east–west width of 89.4km (55.6miles). In the east, the land begins to transition to the foothills of the Changbai Mountains, while the west is marked by the Songliao Plain.
Kaiyuan has a monsoon-influenced humid continental climate (Köppen Dwa), characterised by hot, humid summers and long, cold and windy, but dry winters. The four seasons here are distinctive. A majority of the annual rainfall of 673mm occurs in July and August alone. The monthly 24-hour average temperature ranges from NaN°C in January to 23.9°C in July, and the annual mean is 7.3°C.
Kaiyun was directly hit by tornadoes in 2019 and 2023.