The largest land organism is … a fungus
The largest terrestrial organism on the planet is a fungus called Armillaria solidipes – or honey fungus. The largest honey fungus identified in North America is in Oregon. It measures 3.4 miles (5.5 kilometers) across! That’s considerably bigger than the biggest giant sequoia or African elephant. Scientists also believe that this particular honey fungus may be over 2,000 years old. The next largest honey fungus is in the neighboring state of Washington.