Antwan Tolhoek (born 29 April 1994) is a Dutch cyclist, who last rode for UCI Continental team .
Born in Yerseke, Tolhoek was named as part of the squad in the startlist for the 2017 Vuelta a España. In December 2017, he was suspended for 2 months by his team, for possession of sleeping pills during a pre-season training camp â violating the team's internal rules. In July 2018, he was named in the start list for the 2018 Tour de France. In May 2019, he was named in the startlist for the 2019 Giro d'Italia.
His father Patrick Tolhoek was also a professional cyclist.
On July 16, 2025, the Union Cycliste Internationale (UCI) announced that Tolhoek had been found guilty of an anti-doping rule violation following the detection of Anabolic Androgenic Steroids (AAS) in his system. As a result, Tolhoek was handed a four-year period of ineligibility, rendering him unable to compete in any UCI-sanctioned events until February 6, 2028. In accordance with anti-doping regulations, Tolhoek retains the right to appeal the decision through the Court of Arbitration for Sport (CAS).