Known works by German painter Willy Tiedjen (1881–1950) are documented in exhibition catalogues, sales catalogues, or contemporary publications. The following list includes paintings, etchings, and other works for which reliable sources provide a title, description, or record of exhibition or sale. Dates generally indicate the year in which a work was first recorded, which may differ from the year of its creation. The list is not exhaustive, but reflects all known works that have been verified through published references.