Dalby is a Scandinavian place name meaning "valley settlement", during the Viking Age, the name was brought to England and it later also became an English surname. It can be a locational surname for those from Dalby, Lincolnshire, near Spilsby; in Dalby, Leicestershire near Melton Mowbray, and in Dalby, North Yorkshire near Terrington. Notable people with the surname include:
Amy Dalby, British actressAndrew Dalby, Culinary writerAndy Dalby, guitaristDave Dalby, former NFL football playerDavid Dalby, British linguist, founder of Linguasphere ObservatoryGraham Dalby, British Band Leader The London Swing OrchestraGreg Dalby, American soccer playerLiza Dalby, American anthropologist and writerMark Dalby (1938–2013), British Anglican ArchdeaconNicolas Dalby, Danish mixed martial artistRobert Dalby, English martyrWilliam Bartlett Dalby (1840–1918), British aural surgeon and otologisthe