KTS
KTS/Kts may refer to:

Keirsey Temperament Sorter, a self-assessed personality questionnaire
Key telephone system
Klippel–Trénaunay syndrome in medicine
Knight of the Military Order of the Tower and Sword of Portugal
The Knights Templar School, a secondary school in Baldock, Hertfordshire, England
Knot (unit), a unit of speed equal to one nautical mile per hour
Brevig Mission Airport (IATA: KTS)
Potassium thiosulfate, a chemical compound commonly abbreviated as KTS.
Københavns Tekniske Skole, a school of secondary education in Copenhagen, Denmark
Kagoshima Television, a Japanese commercial TV station