Critical density may refer to:
- Critical density (cosmology), the matter density of a spatially flat Universe
- Critical density (thermodynamics), the density of a substance at its thermodynamic critical point
- Critical plasma density, the density at which the plasma frequency equals the frequency of an electromagnetic electron wave in plasma
|This disambiguation page lists articles associated with the title Critical density.
If an internal link led you here, you may wish to change the link to point directly to the intended article.