Bayes may refer to:
 Thomas Bayes (1702–1761), British mathematician, statistician and religious leader

 Bayesian probability
 Bayes' theorem, a result in probability theory
 Bayes estimator, a statistical estimator that minimizes the average risk
 Gilbert Bayes (1872–1953), British sculptor
 Nora Bayes (1880–1928), American singer and actress
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