Alexander Keiller or Keillor may refer to:
Alexander Keiller (archaeologist) (1899–1955), Scottish archaeologist who worked at Avebury Alexander Keiller Museum, Avebury Alexander Keiller (businessman) (1804–1874), Scottish businessman who founded the Swedish company Göteborgs Mekaniska Verkstad Alexander Keiller (physician) (1811–1892), Scottish physician and obstetrician Alex Keillor (1869–1960), Scottish footballer