Encyclopedias, Almanacs, Transcripts, and Maps
- Sindhis
- Singer, Peter (1946–)
- Sinhô (1888–1930)
- Sion-Petit Chasseur
- Siona-Secoya
- Sioux Nations: Dakota
- Sioux Nations: Lakota
- Sioux Nations: Nakota
- Sipakapense
- Sipán
- Sirhan, Sirhan Bishara
- Sirica, John Joseph
- Sirionó
- Sirionó
- ŞIrket-I Hayriye
- Sisco, Joseph John (“Joe”)
- Siskind, Aaron
- Sisler, George Harold
- Sistan and Baluchistan
- Sitra