Islington South may refer to:

• The southern area of the London Borough of Islington, in London, England
• Islington South and Finsbury (UK Parliament constituency) (1974–present)
• Islington South (UK Parliament constituency) (1885–1950)

• Crestonia
• Creston, IA
• Crestonic
• Crestonica
• Crestonice
• Creston, IL
• Creston, Illinois
• Creston, NE
• Creston, Nebraska
• Creston, OH
• Creston, Ohio
• Creston, WA
• Creston, Washington
• Crestor
• Crest (Physics)
• CREST (securities depository)
• CREST syndrome
• Crest-tailed Marsupial Rat
• Crest Theatre
• Crest (toothpaste)
• Crestview
• Crestview, FL
• Crestview, Florida
• Crestview Hills
• Crestview Hills, Kentucky