- Salvation Army@ (45)
- Santeria@ (12)
- Satanism@ (312)
- Schwarzenau Brethren@ (31)
- Scientology@ (472)
- Seon Buddhism@ (565)
- Sephardi@ (9)
- Set, Temple of@ (16)
- Seventh Day Baptists@ (5)
- Seventh-day Adventists@ (925)
- Shamanism@ (85)
- Shango Baptist@ (1)
- Shingon Buddhism@ (7)
- Shintoism@ (12)
- Sikhism@ (150)
- Slavic@ (3)
- Snake Handling@ (11)
- Society of Friends@ (154)
- Southern Baptist Convention@ (1,170)
- Southern Congregational Methodist@ (1)
- Southern Methodists@ (6)
- Sovereign Grace Ministries@ (9)
- Spiritualism@ (409)
- Starseeds@ (4)
- Stregheria@ (3)
- Subud@ (10)
- Sufism@ (163)
- Sumerian Mesopotamian@ (7)
- Swedenborgians@ (68)
