IRX

IRX may refer to:
 * Irish Rallycross Championship, a Rallycross championship in the Republic of Ireland
 * irx, the ISO 639-3 code for Kamberau language
 * Aria Air, the ICAO code IRX
 * Iroquois homeobox protein family
 * IRX1
 * IRX2
 * IRX3
 * IRX4
 * IRX5
 * IRX6