SU2 may refer to:
SU(2), the 2-dimensional special unitary group in mathematics SU-2, a scout version of the Vought O2U Corsair biplane SU2 code, a suite of open-source software tools written in C++ for the numerical solution of partial differential equations Sukhoi Su-2, a Soviet reconnaissance and light bomber aircraft used in the early stages of World War II
Asteroids 3158 Anga (provisionally 1976 SU), a minor planet discovered on September 24, 1976 5499 (provisionally 1981 SU), a minor planet discovered on September 29, 1981 7887 Bratfest (provisionally 1993 SU), a minor planet discovered on September 18, 1993