Grewcock's Sportive Lemur (Lepilemur grewcocki) is a sportive lemur endemic to Madagascar. It is a medium-sized sportive lemurs with a total length of about 55 to 63 centimeters, of which 26-30 centimeters are tail. Grewcock's Sportive Lemur is found in northwesetrn Madagascar, living in dry deciduous forests .
The Latin name for this animal is sometimes given as L.grewcockorum. The common name is sometimes given as Grewcocks' Sportive Lemur.
There is some question as to whether the Manasamody Sportive Lemur, L. manasamody, is actually the same species as Grewcock's Sportive Lemur. If so, L. manasamody would be considered a junior synonym of L. grewcocki.