XX

XX may refer to:

* 20 (number), in Roman numerals
*A Song for XX album by J-pop star Hamasaki Ayumi
* XX chromosomes, see XY sex-determination system
* Dos Equis ("Two Xs"), a brand of Mexican beer
* "XX" (CSI episode), the seventeenth episode in the fourth season of "CSI"
* "XX Angel Rabbie", an alternative title of "Tenbatsu! Angel Rabbie" anime series
* The Double Cross System, a British deception operation in the Second World War
* "XX" (album), an album from the band Mushroomhead in 2001
* The XX (organization), a fictitious organisation in the comic book "XIII"

ee also

*X (disambiguation)
*XXX
*XXXX (disambiguation)