KS
- Contract
- K+S
- Kallmann syndrome
- Kammersänger
- Kampfschwimmer
- Kansas
- Kaplan–Sheinwold
- Kaposi's sarcoma
- Kartagener syndrome
- Kashmiri Wikipedia
- Kashmiri language
- Kassel
- Katawa Shoujo
- Keenspot
- Keratan sulfate
- Kernel streaming
- Kernowek Standard
- Ketoacyl synthase
- Key Stage
- Khatumo State
- Kiasu
- Kill stealing
- Kilosecond
- King's Scholar
- King's Serjeant
- Kirk/Spock
- Klinefelter's Syndrome
- Kolmogorov–Smirnov test
- Kommandittselskap
- Košice-okolie District
- Krems an der Donau
- Northampton
- Norwegian Association of Local and Regional Authorities
- PenAir
- Slovak koruna
- South Kalimantan
- Strikeout
- The K's
- X