Sir Cyril Chantler GBE FRCP FRCPCH FMedSci (born 12 May 1939) is a British paediatric nephrologist. Chantler was notable for devising a method with of measuring glomerular function in children and later researched diet and growth failure in children with renal impairment. Chantler was most notable for holding an independent review of public health evidence for standardised tobacco packaging that later became known as the Chantler Review that led to standardised packaging for tobacco and cigarette packets.