| Official Name: | Owrtasu |
| Native Name: | Persian: اورتاسو |
| Settlement Type: | Village |
| Pushpin Map: | Iran |
| Subdivision Type: | Country |
| Subdivision Name: | Iran |
| Subdivision Type1: | Province |
| Subdivision Name1: | East Azerbaijan |
| Subdivision Type2: | County |
| Subdivision Name2: | Charuymaq |
| Subdivision Type3: | District |
| Subdivision Name3: | Shadian |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Charuymaq-e Sharqi |
| Population As Of: | 2016 |
| Population Total: | 1201 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 37.0247°N 47.4244°W |
| Coordinates Footnotes: | [1] |
Owrtasu (Persian: اورتاسو) is a village in Charuymaq-e Sharqi Rural District of Shadian District, Charuymaq County, East Azerbaijan province, Iran.
At the time of the 2006 National Census, the village's population was 1,029 in 177 households.[2] The following census in 2011 counted 1,278 people in 271 households.[3] The 2016 census measured the population of the village as 1,201 people in 303 households. It was the most populous village in its rural district.[4]