Geoscientist may refer to:
- Geoscientist, a person studying Earth or other planets using Earth science
- Geochemist (see Geochemistry)
- Geologist, a scientist who studies the solid, liquid, and gaseous matter that constitutes the Earth and other terrestrial planets
- Geophysicist (see Geophysics)
- Planetologist (see Planetary science)
- Geoscientist (magazine), the official membership magazine of the Geological Society of London