| Official Name: | Alustan |
| Native Name: | الوستان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Golestan |
| Subdivision Type2: | County |
| Subdivision Name2: | Aliabad |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Katul |
| Population As Of: | 2006 |
| Population Total: | 430 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.9617°N 54.8372°W |
Alustan (Persian: الوستان, also Romanized as Ālūstān and Alūstān) is a village in Katul Rural District, in the Central District of Aliabad County, Golestan Province, Iran. At the 2006 census, its population was 430, in 112 families.