Sunstar or Sun Star may refer to:
- The Sun
- Merced Sun-Star in California, United States
- Sun Star (Alaska), a student newspaper in Alaska, United States
- Sun.Star in the Philippines
- Sunstar (photography), an optical phenomenon found on photos of bright objects taken with a small aperture
- Sunstar (racehorse), a British racehorse
- Ornithogalum dubium, a flowering plant
- Sunflower starfish (Pycnopodia helianthoides), also known as the sun star or sunflower star
- Sunstar Group, global health and beauty, chemical, and motorcycle parts conglomerate
| This disambiguation page lists articles associated with the title Sunstar.
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