Willi is a given name. Notable people with the given name include:
Willi Apel (1893–1988), German-American musicologist
Willi Forst (1903–1980), Austrian actor, screenwriter, film
Willi Hennig (1913–1976), German biologist
Willi Münzenberg (1889–1940), Communist political activist
Willi Stoph (1914–1999), East German politician
Willi Tokarev (born 1934), Russian and former expatriate Russian-American singer-songwriter
Willi Weber (born 1942), manager of German racing drivers
Willi Ziegler (1929–2002), a German paleontologist
