The white-gaped honeyeater (Stomiopera unicolor) is a species of bird in the family Meliphagidae. It is endemic to Australia.
Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical mangrove forests.
The white-gaped honeyeater was previously placed in the genus Lichenostomus, but was moved to Stomiopera after a molecular phylogenetic analysis published in 2011 showed that the original genus was polyphyletic.