Not even close, Jupiter has a way bigger one.
No, Charon is not the biggest moon in the solar system. The actual biggest moon in the solar system is Ganymede, which is 5,268 km at the equator
Moon
The largest moon in the solar system is Ganymede, one of the moons of Jupiter.
The fifth largest moon in our Solar System is our Moon.
Io is not. It's Ganymede, the biggest moon in the solar system.
The largest moon in the solar system is Ganymede, a moon of Jupiter. The moon is larger by volume than the planet Mercury but is only half as massive.
The fourth biggest moon in our Solar System is Io a moon of Jupiter. See related question.
Ganymede is the largest Galilean moon, the largest Jovian moon, and the largest moon in the solar system.
The third biggest moon in our solar system is Ganymede, which orbits Jupiter. It is the largest moon in our solar system and is even bigger than the planet Mercury. Ganymede has a radius of about 2,634 kilometers (1,636 miles).
Titan is the 2nd biggest moon of the Solar System, and is in orbit of Saturn. And yes, Titan is biggest than Mercury.
People don't know that and probably never will but the biggest moon in our solar system is Jupiters moon Ganymede
Ganymede - moon of JupiterTitan - Moon of SaturnCallisto - moon of Jupiter