The largest moons in the Solar System
TOP 25The largest moon in this catalogue is Ganymede, with a radius of 0.41 R⊕ · 2631 km. Next are Titan and Callisto.
Ranked by radius. The top of this list is a strange place: the two largest moons are both bigger than the planet Mercury, and neither of them orbits Earth.
NAME
CLASS
MASS
DISTANCE
MAG
CONSTELLATION
Ganymede★
Moon of Jupiter
0.02 M⊕
1 070 400 km · Jupiter
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Titan★
Moon of Saturn
0.02 M⊕
1 221 900 km · Saturn
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—
Callisto★
Moon of Jupiter
0.02 M⊕
1 882 700 km · Jupiter
—
—
Io★
Moon of Jupiter
0.01 M⊕
421 800 km · Jupiter
—
—
Moon★
Moon of Earth
0.01 M⊕
384 400 km · Earth
—
—
Europa★
Moon of Jupiter
8.03×10⁻³ M⊕
671 100 km · Jupiter
—
—
Triton★
Moon of Neptune
3.58×10⁻³ M⊕
354 800 km · Neptune
—
—
Titania
Moon of Uranus
5.69×10⁻⁴ M⊕
436 298 km · Uranus
—
—
Rhea
Moon of Saturn
3.86×10⁻⁴ M⊕
527 200 km · Saturn
—
—
Oberon
Moon of Uranus
5.15×10⁻⁴ M⊕
583 511 km · Uranus
—
—
Iapetus★
Moon of Saturn
3.02×10⁻⁴ M⊕
3 561 700 km · Saturn
—
—
Charon
Moon of Pluto
2.66×10⁻⁴ M⊕
19 600 km · Pluto
—
—
Umbriel
Moon of Uranus
2.13×10⁻⁴ M⊕
265 986 km · Uranus
—
—
Ariel
Moon of Uranus
2.09×10⁻⁴ M⊕
190 929 km · Uranus
—
—
Dione
Moon of Saturn
1.83×10⁻⁴ M⊕
377 700 km · Saturn
—
—
Tethys
Moon of Saturn
1.03×10⁻⁴ M⊕
295 000 km · Saturn
—
—
Enceladus★
Moon of Saturn
1.08×10²⁰ kg
238 400 km · Saturn
—
—
Miranda
Moon of Uranus
6.44×10¹⁹ kg
129 846 km · Uranus
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—
Proteus
Moon of Neptune
3.87×10¹⁹ kg
117 600 km · Neptune
—
—
Mimas★
Moon of Saturn
3.75×10¹⁹ kg
186 000 km · Saturn
—
—
Nereid
Moon of Neptune
—
5 513 900 km · Neptune
—
—
Hyperion
Moon of Saturn
5.55×10¹⁸ kg
1 481 500 km · Saturn
—
—
Phoebe
Moon of Saturn
8.31×10¹⁸ kg
1.29×10⁷ km · Saturn
—
—
Larissa
Moon of Neptune
3.82×10¹⁸ kg
73 500 km · Neptune
—
—
Janus
Moon of Saturn
1.9×10¹⁸ kg
151 500 km · Saturn
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SEE ALSOALL MOONS