Thielen is a surname. Notable people with the surname include:
- Adam Thielen (born 1990), American football player
- Cynthia Thielen (born 1933), American politician
- Friedrich Thielen (1916–1993), German politician
- Hugo Thielen (born 1946), German journalist. author and editor
- Jan Philips van Thielen (1618–1667), Flemish painter
- Karl-Heinz Thielen (born 1940), German football player
- Rob Thielen (born 1961), Dutch businessman
Surname listThis page lists people with the surname Thielen. If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name(s) to the link. Categories: