The largest planets in our solar system, listed in order of size, are:Jupiter: Jupiter is the largest planet in our solar system, with a diameter of about 143,000 kilometers (88,800 miles). It is more than 11 times the diameter of Earth. Jupiter is a gas giant and consists mostly of hydrogen and helium. It has a powerful magnetic field, dozens of moons, and a distinct banded appearance due to its turbulent atmosphere.Saturn: Saturn is the second-largest planet, with a diameter of approximatel...