| Tianzhen County | |
| Other Name: | Tienchen |
| Postal Code Type: | Postal code |
| Settlement Type: | County |
| Coordinates: | 40.42°N 114.091°W |
| Pushpin Map: | China Shanxi |
| Pushpin Label: | Tianzhen |
| 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: | Datong |
| Population Density Km2: | auto |
| Timezone: | China Standard |
| Utc Offset: | +8 |
Tianzhen County is a county of Shanxi province, China, bordering Hebei province to the northeast, east and south and Inner Mongolia to the northwest. It is under the administration of Datong City and is the northernmost county-level division of the province.