KS-1

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 Royal Marines

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