Wilhelmus "Willem" Tholen (28 May 1900 – 21 March 1984) was a Dutch male weightlifter, who competed in the Light-Heavyweight category and represented the Netherlands at the Olympic Games.

Tholen won the national competition in October 1926 in Haarlem, ahead of W. v/d Heide from The Hague.^[1] Later that month, also at the national competition in Haarlem, he lost of J. Verheien from The Hague.^[2][3] At the national weightlifting championships in June 1927, he won the silver medal, again behind J. Verheien.^[4][5] Two months later, in August 1927, Tholen was officially selected by the national federation to represent the Netherlands at the 1928 Summer Olympics.^[6] From October 1927 the Olympic team, including Tholen, trained one evening every other week at De Jonge Bokser in Amsterdam, supervised by A. de Jong.^[7] Tholen did some competitions as preparation for the Olympic Games, including on 15 January and 24 January 1928 in Haarlem.^[8][9] And during competitions and demonstrations of the Olympic team in April 1928 in Amsterdam.^[10] At the 1928 Summer Olympics he finished 12th.^[11]