IJK

IJK or ijk may refer to:
 * IJK (singer songwriter) (born 1981), Lebanese singer-songwriter
 * Haplogroup IJK
 * Indhiya Jananayaga Katchi, a political party in Tamil Nadu, India
 * International Youth Congress (Internacia Junulara Kongreso)
 * Izhevsk Airport, serving Udmurtia, Russia
 * A convention of naming the axis of Euclidean vectors.
 * In computer science, i, j, k; a common naming convention for the loop counter used in for loops.