KS1 or KS-1 may refer to: Weapons KS-1 (missile), a Chinese surface-to-air missile Raduga KS-1 Komet, a Soviet anti-ship missile KS-1 rifle, an assault rifle adopted by the British Armed Forces
Other uses Kansas's 1st congressional district, to the United States House of Representatives K-1 (Kansas highway), an American road Key Stage 1, a British primary educational term