Largest Moons in the Solar System
Source:
NASA
Key Findings
🏆
Ganymede (Jupiter) leads in Diameter (km) with 5,268.
📊
Average Diameter (km): 3,721 · median: 3,559.
↔️
Gap: Ganymede (Jupiter) is 3.3× larger than Titania (Uranus).
About This Dataset
Largest Moons in the Solar System
The largest natural satellites in our solar system ranked by diameter in kilometres. Ganymede, a moon of Jupiter, is the largest moon in the solar system — at 5,268 km in diameter it is larger than the planet Mercury, and if it orbited the Sun directly rather than Jupiter it would be classified as a planet.
Analysis
Ganymede (Jupiter) heads the table on 5,268, ahead of Titan (Saturn) (5,151) and Callisto (Jupiter) (4,821) in Diameter (km). 3,690 separates the highest figure (5,268) from the lowest (1,578) in Diameter (km). First and second are separated by 117, so the leader sits inside the field rather than apart from it. The field is close behind: 7 of the 8 sit at half the leader's figure or above (2,634+).
Data Insights
Numbers, trends & sources behind this chart
Methodology & source
- Data source
- NASA
- Coverage
- 8 entities · 8 observations
- Measure
- Diameter (km)
- Last updated
- 6 September 2026
- Compiled by
- The ANYSTAT team, from the source above
How the figures are calculated
- Values use the measure and unit named on this page. Consult the dataset description and cited source for coverage, definitions and any unit conversions. Displayed values may be rounded for readability.
- Entities are ranked highest-first on their value.
Data Sources & References
All external sources cited in this dataset
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