Ctenotus essingtonii, also known commonly as Essington's ctenotus and the lowlands plain-backed ctenotus, is a species of skink, a lizard in the family Scincidae. The species is endemic to the Northern Territory in Australia.
The specific name, essingtonii, refers to the locality Port Essington, Australia.
C. essingtonii is found in the northern portion of the Northern Territory, including the Tiwi Islands.
The preferred natural habitat of C. essingtonii is forest.
C. essingtonii may attain a snout-to-vent length (SVL) of . It has five toes on each of its four feet. It is slender, with 26 scale rows at midbody.
Sexually mature individuals of C. essingtonii breed during the dry season. The species is oviparous.