Wilhelm Waetzoldt (21 February 1880 in Hamburg – 5 January 1945) was a German art historian, professor of art history in Halle, Geheimer Oberregierungsrat in the Prussian Ministry of Culture and from 1927 to 1933 general director of the Berlin State Museums.
In 1912, he was appointed professor of modern art history at the Martin Luther University Halle-Wittenberg.
During World War I, Waetzoldt served on the Western Front in the rank of a lieutenant and took part in the Battle of Soissons.
In 1916, due to his war wound, he was transferred to the Landwehr and was able to continue his teaching activities in Halle.
He was charged with financial irregularities, the promotion of modern art and the support and employment of Jews.
Waetzoldt was later offered the opportunity to regain his posts in connection with his entry into the Nazi Party, which he refused.