| Seru | |
| States: | Malaysia |
| Region: | Sarawak |
| Extinct: | ? |
| Familycolor: | Austronesian |
| Fam2: | Malayo-Polynesian |
| Fam3: | Greater North Borneo |
| Fam4: | Central Sarawak |
| Fam5: | Punan–Müller-Schwaner |
| Fam6: | Punan |
| Iso3: | none |
| Glotto: | spurious |
| Glotto2: | seru1247 |
| Glottorefname2: | Seru |
| Iso3comment: | (szd deprecated in 2023) |
Seru or Sru Dayak is an extinct Austronesian language of Sarawak in Borneo. Smith (2017) classifies it as a Punan language.[1]