SK
- .sk
- Amateur radio operator
- Kingdom of Sikkim
- Prosigns for Morse code
- Regulation S-K
- SK (actor)
- SK (people mover)
- SK Foods
- SK Gaming
- SK Group
- SK Hand Tools
- SK channel
- SK radar
- SKI combinator calculus
- Salman Khan
- Sangguniang Kabataan
- Saskatchewan
- Scandinavian Airlines
- Senran Kagura
- Shahram Kashani
- Shakib Khan
- Sikkim
- Silicon Knights
- Sisak
- Slovak koruna
- Slovak language
- Slovakia
- South Kingstown, Rhode Island
- South Korea
- Storekeeper
- Streptokinase
- Sultan Kudarat
- Super-Kamiokande
- Svidník
- Søren Kierkegaard