KSS
- Basketball Federation of Serbia
- Communist Party of Slovakia
- Communist Party of Slovakia (1939)
- Joyson Safety Systems
- KSS (company)
- KSS Design Group
- Kalyana Samayal Saadham
- Kata'ib Sayyid al-Shuhada
- Kearns–Sayre syndrome
- Kelowna Secondary School
- Keystone State Skinheads
- Khitan small script
- Khwarizmi Science Society
- Kibuli Secondary School
- Kingsmill Secondary School
- Kingston Secondary School
- Kirby Super Star
- Kirby's Star Stacker
- Kirtland Safety Society
- Kissi language
- Klahowya Secondary School
- Knightswood Secondary School
- Kochi Sun Sun Broadcasting
- Kranji Secondary School
- Kristiania Sporveisselskab
- Kudumbi
- Kurdish Sorani Standard Bible
- Kwalikum Secondary School
- Order of St. Sylvester
- Plone (software)
- Sikasso Airport
- Velocette KSS