K21 (disambiguation)

K21 is a South Korean infantry fighting vehicle.

K21 may also refer to:

Vehicles

 * Automobiles
 * Changhe Freedom K21, a Chinese pickup truck


 * Ships
 * HMS Dart (K21), a frigate of the Royal Navy
 * HSWMS Göteborg, a corvette of the Swedish Navy
 * SOVIET SUBMARINE K-21


 * Aircraft
 * Schleicher ASK 21, a two-seater training glider commonly referred to as the K21

Other uses

 * Gastroesophageal reflux
 * Lactobacillus plantarum strain K21
 * Uniform k21 polytope
 * "Va, dal furor portata", an aria by Wolfgang Amadeus Mozart