Calum Waters may refer to:

• Calum Waters (footballer) (born 1996), Scottish footballer
• Calum Waters (rugby player) (born 1996), English rugby union player

• Leask No. 464
• Leasor, James
• Leasowes Community College
• Lea Springs
• Least Absolute Shrinkage and Selection Operator
• Least adder's-tongue
• Least Adder's-tongue
• Least adder's tongue
• Least-Angle Regression
• Least areas regression
• Least Bell
• Least bell
• Least black arches
• Least boobook
• Least bur-reed
• Least bur reed
• Least carpet
• Least-concern
• Least concern amphibians
• Least concern birds
• Least concern fish
• Least concern fishes
• Least concern insects
• Least Concern (IUCN Red List of Ecosystems)
• Least concern mammals