List of largest extinct lizards

List of largest extinct lizards which are members of the order Squamata.

Geckos (Gekkota)

An extinct member of family Diplodactylidae, Kawekaweau or Delcourt's giant gecko, the largest gecko of all time. It had a snout-vent length of 37 cm, a total length of 60 cm. and a mass of.
Some members of genus Phelsuma are among the largest of extant geckos. However, the extinct Rodrigues giant day gecko was the largest day gecko and second-largest of all geckos, with a length of up to 40 cm and possibly even 44 cm, and body mass 193.43 g.

The extant members of genus Brachylophus are iguanas small and medium-sized, growing a length of. Although, in the past there was a much larger member of this family – Brachylophus gibbonsi, reached in length of, and thus, was 1.8 times longer than its modern relatives. Another very large extinct iguanid, reached even larger – Lapitiguana impensa which had a length of 1.5 m.

The largest ever lived lacertid, the goliath Tenerife lizard reached the length of.

The largest mosasaurs were Mosasaurus and Tylosaurus species, which grew to around and were projected to weigh up to.

The Cape Verde giant skink was a very large skink that grew up to a snout-vent length of and in a total length.
Another very large extinct skink is the Mauritian giant skink which is the largest skink so far discovered; it grew to a snout-vent length of with a total length of, and according to some information up to

The prehistoric Australian megalania, which may have existed up to 40,000 years ago, is the largest varanid and the largest terrestrial lizard known to exist, but the lack of a complete skeleton has resulted in a wide range of size estimates. Molnar's 2004 assessment resulted in an average weight of and length of, and a maximum of at in length, which is toward the high end of the early estimates. However, a 2009 study estimated megalania at 5.5 m and 575 kg.
Some prehistoric non-varanoid anguimorphs approached varanid sizes. Palaeosaniwa was roughly comparable to a large monitor lizard in size. Measuring around in length, it is among the largest terrestrial lizards known from the Mesozoic era. Later study shows estimation with snout–vent length about for Maastrichtian species. Asprosaurus may compete with Palaeosaniwa in size. Another large Mesozoic lizard was Chianghsia, with snout-vent length of over.