Chamaeleo necasi, also known commmonly as Necas's chameleon or Necas' chameleon, is a species of lizard in the family Chamaeleonidae. The species is native to West Africa.
The specific name, necasi, is in honor of Czech herpetologist .
Chamaeleo necasi is found in Benin and Togo.
The preferred natural habitat of Chamaeleo necasi is forest, at elevations up to .
Chamaeleo necasi is oviparous.