H11

H11, H-11 or H 11 may refer to :
 * H-11 (Michigan county highway)
 * British NVC community H11, a type of heath community in the British National Vegetation Classification
 * Heathkit H-11, a microcomputer
 * HMS Basilisk (H11), a Royal Navy B-class destroyer
 * HMS Racehorse (H11), a Royal Navy R-class destroyer
 * HMS H11, a Royal Navy H-class submarine
 * London Buses route H11, a Transport for London contracted bus route
 * Sanguiin H 11, a type of tannin
 * A motor vehicle headlamp bulb type; see List of automotive light bulb types