K38

K38 may refer to:
 * K-38 (Kansas highway)
 * Apollo et Hyacinthus, an opera by Wolfgang Amadeus Mozart
 * HMS Mignonette (K38), a corvette of the Royal Navy
 * INS Haifa (K-38), a Hunt-class destroyer of the Israeli Navy
 * K-38 trailer, an American military trailer
 * K38 Water Safety, an American training organization
 * Opel Kadett K38, a German automobile
 * Potassium-38, an isotope of potassium
 * Smith & Wesson Model 14, originally the K-38 Target Masterpiece
 * Smith & Wesson Model 15, originally the K-38 Combat Masterpiece
 * Washington County Memorial Airport, in Kansas