Water is present as ice on:
Mars: under the regolith and at the poles.

Earth–Moon system: mainly as ice sheets on Earth and in Lunar craters and volcanic rocks NASA reported the detection of water molecules by NASA's Moon Mineralogy Mapper aboard the Indian Space Research Organization's Chandrayaan-1 spacecraft in September 2009.

Ceres
Jupiter's moons: Europa's surface and also that of Ganymede and Callisto
Saturn: in the planet's ring system and on the surface and mantle of Titan and Enceladus
Pluto–Charon system
Comets and other related Kuiper belt and Oort cloud objects
And is also likely present on:
Mercury's poles
Tethys
Water is present as ice on:
Mars: under the regolith and at the poles.
Earth–Moon system: mainly as ice sheets on Earth and in Lunar craters and volcanic rocks NASA reported the detection of water molecules by NASA's Moon Mineralogy Mapper aboard the Indian Space Research Organization's Chandrayaan-1 spacecraft in September 2009.
Ceres
Jupiter's moons: Europa's surface and also that of Ganymede and Callisto
Saturn: in the planet's ring system and on the surface and mantle of Titan and Enceladus
Pluto–Charon system
Comets and other related Kuiper belt and Oort cloud objects
And is also likely present on:
Mercury's poles
Tethys
Water