Tropidosaura cottrelli, also known commonly as Cottrell's mountain lizard, is a species of lizard in the family Lacertidae. The species is native to southern Africa.
The specific name, cottrelli, is in honor of South African ornithologist , who collected the holotype.
T. cottrelli is found in Lesotho and South Africa.
The preferred natural habitat of T. cottrelli is grassland, at altitudes of .
T. cottrelli is large for its genus. Adults have a snout-to-vent length (SVL) of .
T. cottrelli is oviparous. An adult female may lay as many as four eggs.