Hyl

Hyl or HYL may refer to:
 * Helsingin yhteislyseo, a school in Kontula, Helsinki, Finland
 * Hydroxylysine, an amino acid
 * HYL, the IATA code for Hollis Seaplane Base, Alaska, US
 * HYL, the National Rail code for Hayle railway station, Cornwall, UK
 * Hyl (unit) or metric slug, a unit of mass
 * Nils Hylander (1904–1970), Swedish botanist, author abbreviation