List of stars and star systems beginning with the letter "X".
| Star or star system | Arity | Makeup | Associated bodies | Locational references |
|---|---|---|---|---|
| Xanthii | part of trinary star system | unknown | Alfr, Thelonii | near Sol (within 25 light-years) |
| Xi Herculis | binary star | white star and yellow dwarf components, spectral class K0III | Aurelia | Hercules constellation, visible from Sol (135 light-years) |
| Xi Hydrae | star system | spectral class G8III | Visalayan | Hydra constellation, visible from Sol (129 light-years) |
| Xi Pegasi | singular | spectral class F7V | Neethia | Pegasus constellation, visible from Sol (53 light-years), near 94 Aquarii (31 light-years) |