S stars, S star, S-stars, or S-star may refer to:
S-type star, a late-type giant star, a cool giant with approximately equal quantities of carbon and oxygen in its atmosphere Stars around the supermassive black hole at the Milky Way galactic centre, associated with radio source Sagittarius A* S2 (star) S55 (star) or S0–102 S62 (star) S*, or S star, a collaboration between seven universities and the Karolinska Institutet of Sweden to provide course material for training in bioinformatics and genomics