The Giant earthworm is a name often given to a variety of large invertebrates in the class Clitellata, many being from the family Megascolecidae. It may refer to:
Australia and New Zealand Giant Gippsland earthworm, up to 3 m in length Spenceriella gigantea, up to 1.4 m in length Lake Pedder earthworm, extinct
North America Giant Palouse earthworm, up to 1 m in length Oregon giant earthworm, up to 0.9 m in length
South America Rhinodrilus fafner, extinct
Europe Lumbricus badensis, up to 0.6 m in length
Africa Microchaetus rappi up to 1.8 m in length
Southeast Asia Amynthas mekongianus, the Mekong worm, up to in length Kinabalu giant earthworm, up to 0.7 m in length
Cryptozoology Indus worm, Pakistan Lambton Worm, North East England Minhocão, Brazil Mongolian death worm, Gobi Desert Tatzelwurm, European Alps, a hoax
See also Archispirostreptus gigas, a giant millipede Caecilian, a worm-like amphibian Giant tube worm Lineus longissimus or bootlace worm, up to 55 metres long Marine worm Sheltopusik, a glass lizard with worm-like appearance Sphaerotheriida, the giant pill millipede