H19 or H-19 may refer to: H19 (gene), a maternally-transmitted human gene British NVC community H19, a type of heath community in the British National Vegetation Classification Heathkit H19, a serial terminal used with the Heathkit H8 microcomputer Highway H19 (Ukraine) , an H-class submarine ordered by but not commissioned into the Royal Navy , a Royal Navy H-class destroyer London Buses route H19, a public transportation route in London, England Sikorsky H-19, an American helicopter