K33

K33 or K-33 may refer to:
 * K-33 (Kansas highway)
 * K-33 truck, an American military truck
 * HSWMS Härnösand, a corvette of the Swedish Navy
 * Kissaviarsuk-33, a sports club from Greenland
 * Kyrie in F major, K. 33, by Wolfgang Amadeus Mozart
 * Potassium-33, an isotope of potassium
 * Salem Memorial Airport, in Dent County, Missouri, United States
 * SOVIET SUBMARINE K-33
 * K3,3, the complete bipartite graph on 3 vertices