SLQ may refer to
SkyLink Express, a Canadian cargo airline, by ICAO code Sleetmute Airport, Alaska, by IATA code St. Lawrence and Atlantic Railroad, Canada, by reporting mark St Leonards Warrior Square railway station, a railway station in Sussex, England State Library of Queensland, Australia Standing Liberty quarter, a 25-cent coin that was struck by the United States Mint from 1916 to 1930
slq is the ISO 639 code of the Salchuq language.