| Official Name: | Hajjiabad-e Atashgah |
| Native Name: | حاجي اباداتشگاه |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Semnan |
| Subdivision Type2: | County |
| Subdivision Name2: | Garmsar |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Lajran |
| Population As Of: | 2006 |
| Population Total: | 827 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.2414°N 52.4022°W |
Hajjiabad-e Atashgah (Persian: حاجي اباداتشگاه, also Romanized as Ḩājjīābād-e Ātashgāh; also known as Hājī Ābād and Ḩājjīābād) is a village in Lajran Rural District, in the Central District of Garmsar County, Semnan Province, Iran. At the 2006 census, its population was 827, in 221 families.