Varanoidea is a superfamily of lizards, including the well-known family Varanidae (the monitors and goannas).

Throughout their long evolutionary history, varanoids have exhibited great diversity, both in habitat and form.

[1][2][3] Carroll characterises the varanoids as "the most advanced of all lizards in achieving large size and an active, predaceous way of life".

Some taxa, such as the extinct necrosaurids and the possibly varanoid Gila monsters, were armoured with osteoderms (bony deposits on the skin), and many forms have hinged jaws, allowing them to open their mouths very wide when feeding (though they cannot dislocate their jaws, contrary to popular belief).

[1][4] According to Estes et al., 1988, which uses morphological characteristics, Varanoidea includes Helodermatidae, Lanthanotus, and Varanus.