The Green Hylia (Hylia prasina) is a species of Old World warbler in the Sylviidae (or Cettiidae) family. It is the only species in its genus.

It is found in Angola, Benin, Cameroon, Central African Republic, Republic of the Congo, Democratic Republic of the Congo, Ivory Coast, Equatorial Guinea, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Liberia, Mali, Nigeria, Senegal, Sierra Leone, Sudan, Tanzania, Togo, and Uganda. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical swamps, subtropical or tropical moist montane forests, and moist savanna.