| Surname | Mother Tongue | State of Origin |
|---|
| Shomik | | |
| Simoes | (Christian's) | |
| Sing | | |
| Singh | Hindi | Uttar Pradesh |
| Singh | Marwari; Garhwali | North Indian (Himachal, Rajasthan, Uttarakhand, U.P, Delhi) |
| Singh | Hindi | Madhya Pradesh |
| Singh | Oriya | Orissa |
| Singh | Punjabi | Punjab |
| Singh Deo | Oriya | Orissa |
| Somayaji | | |
| Samiksha | | |
| Sanaka | | |
| Sangha | | |
| Sanghi | | |
| Saunak | | |