Piya Tan Beng Sin (Chinese: ???; born 20 August 1949 in Malacca, Malaysia), also known as Piya Tan or Piyasilo (monastic name), is a Peranakan full-time lay Buddhist writer-cum-teacher in Singapore.
He actively teaches the Buddha's Dharma, meditation and Pali to various Buddhist groups and organisations, and also works as a meditation therapist and counsellor at The Minding Centre (TMC).
He is the first full-time lay Dharma worker ("Dharmacari") in Singapore to be supported by donations from the Buddhist community.