| Official Name: | Heydarabad |
| Native Name: | حيدر آباد |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Semnan |
| Subdivision Type2: | County |
| Subdivision Name2: | Damghan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Howmeh |
| Population As Of: | 2006 |
| Population Total: | 203 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.1628°N 54.3917°W |
Heydarabad (Persian: حيدر آباد, also Romanized as Ḩeydarābād) is a village in Howmeh Rural District, in the Central District of Damghan County, Semnan Province, Iran. At the 2006 census, its population was 203, in 59 families.