A blue giant is a hot star with a luminosity class of III (giant) or II (bright giant).

Blue giant may also refer to:

Blue Giant (band), a band from Portland, Oregon Blue Giant Equipment Corporation, a loading dock equipment manufacturer Blue Giant (manga), a Japanese manga series by Shinichi Ishizuka

See also

Agastache foeniculum, a plant species also known as blue giant hyssop Blue star (disambiguation) Blue dwarf (disambiguation)