XO-2 is a star.

XO-2 may also refer to:

XO-2Nb, an extrasolar planet orbiting XO-2. OLPC XO-2, a design study of the One Laptop per Child computer Douglas XO-2, a variant of the Douglas O-2 U.S. Army Air Corps interwar observation plane

See also

X02 (September 2002), a Microsoft Xbox expo \x02 control code X2 (disambiguation)