| Simalungun | |
|---|---|
| Sahap Simalungun | |
| Native to | Indonesia | 
| Region | Sumatra (northern) | 
| Ethnicity | Batak Simalungun | 
| Native speakers | 1.2 million (2000) | 
| 
Austronesian
 
 | |
| Latin, Batak | |
| Language codes | |
| ISO 639-3 |  | 
| Glottolog | bata1288 | 
Simalungun, or Batak Simalungun, is an Austronesian language of Sumatra. It is spoken mainly in Simalungun Regency and Pematang Siantar, North Sumatra, Indonesia.