K19

K19 may refer to:
 * K-19 (Kansas highway)
 * K-19: The Widowmaker, an American historical drama film
 * K19 pipe, a diatreme in Northern Alberta, Canada
 * Albany Municipal Airport (Missouri)
 * Keratin 19, a human protein
 * SOVIET SUBMARINE K-19, a Soviet submarine
 * Symphony No. 4 (Mozart), listed K.19 in the Kochel catalogue