The Top 5 Largest Planetary Moons

  Moon Diameter Km
(diameter miles)
Planet Orbited Discovered By
(year)
1 Ganymede 5,262 km
(3,269 mi)
Jupiter Galileo Galilei,
(1610)
2 Titan 5,150 km
(3,200 mi)
Saturn Christian Huygens,
(1655)
3 Callisto 4,806 km
(2,986 mi)
Jupiter Galileo Galilei,
(1610)
4 Lo 3,642 km
(2,263 mi)
Jupiter Galileo Galilei,
(1610)
5 The Moon 3,476 km
(2,159 mi)
Earth Ancient Observer,
(unknown)
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 Special Report
List is ranked by diameter.
Tags: Space & The Universe, Top 5 Largest

Sources:  NASA, Top 5 of Anything Research.

List Notes: 
Largest Planetary Moons

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