Quintile may refer to:

  • In statistics, a quantile for the case where the sample or population is divided into fifths
  • Quintiles, a biotechnology research company based in the United States
  • Household income in the United States#Quintiles, a division of households by income into five quantiles in the United States
  • Quintile (astrology), a type of astrological aspect formed by a 72ยบ angle