Wan Waithayakon (full title: His Royal Highness Prince Vanna Vaidhayakara, the Prince Naradhip Bongsprabandh), known in the West as Wan Waithayakon (1891–1976), was a Thai royal prince and diplomat.
He was President of the Eleventh Session of the United Nations General Assembly (1956–1957), while serving as Thailand's Permanent Representative to the United Nations.