The largest natural satellite in our solar system belongs to which planet?

Ganymede is larger than Mercury and Pluto, and is only 949 miles smaller in diameter than Mars. If it was circling the sun rather than Jupiter, it would be a planet.

RushMama2112, Ganymede, a moon of Jupiter, is the largest.

But which one is the biggest?

It was announced very recently that Saturn now has 274 moons.

Rosie-knees, I agree, all that other information but not actually the relevant bit.