The slaty-headed tody-flycatcher (Poecilotriccus sylvia) is a species of bird in the family Tyrannidae, and one of twelve in the genus Poecilotriccus.
It is found in Belize, Brazil, Colombia, Costa Rica, French Guiana, Guatemala, Guyana, Honduras, Mexico, Nicaragua, Panama, and Venezuela. Its natural habitats are subtropical or tropical dry forest, subtropical or tropical moist lowland forest, and heavily degraded former forest.