Sunstar or Sun Star may refer to:

Astronomy

• The Sun

Newspapers

• Merced Sun-Star in California, United States

• Sun Star (Alaska), a student newspaper in Alaska, United States

• SunStar in the Philippines

• SunStar Cebu

• SunStar Davao

• SunStar Manila

Biology

Plants

• Ornithogalum dubium, a plant in the family Asparagaceae, subfamily Scilloideae

Sea stars

• Solaster stimpsoni, a sea star

• Solaster dawsoni, a sea star

• Sunflower sea star (Pycnopodia helianthoides), also known as the sun star or sunflower star

Other

• Sunstar (photography), an optical phenomenon found on photos of bright objects taken with a small aperture

• Sunstar (racehorse), a British racehorse

• Sunstar Group, global health and beauty, chemical, and motorcycle parts conglomerate

• Sunstar, a character from Mega Man V