Geert Vandewalle (6 December 1964 – 26 November 1988) was a Belgian cyclist. He was Belgian amateur champion in 1985, whereupon he immediately signed a contract with the Lotto team for whom he rode in 1986 and 1987. In 1988, he switched to Isoglass-Robland.
On 26 November 1988, he died of a heart attack during a training ride with friends, ten days before his 24th birthday.
His death was noted by Willy Voet in his book Massacre àla chaîne although he acknowledged the impossibility of proving the link between these early deaths and the drugs taken while racing.