Pieter "Peter" van Doorn (born 29 January 1946) is a retired Dutch cyclist who was active between 1969 and 1975.

Between 1969 and 1972, he won four consecutive national titles in the tandem.

[1] He competed at the 1972 Summer Olympics in the sprint, 1 km time trial and 2 km tandem events and finished in fifth, eleventh and fifth place, respectively.

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