The dwarf planet Eris best fits this description, with a year about 561 years long.
The dwarf planet Pluto is the planet with a year 248 earth years long.
The dwarf planet Haumea is the planet with a year 280 earth years long.
The dwarf planet Makemake is the planet with a year 310 earth years long.
Mars.
It is 84 Earth years
Uranus.
uranus
neptune
11.68 years
Saturn. Its orbital period of the sun is around 29.4 years.
The dwarf planet, Pluto, has a year of 247.9 Earth years.
One year on the planet Neptune is the equivalent of 164.79 years on Earth. A day on Neptune is equal to 16 hours and 6 minutes.