Willich is a German-language surname.
Anthony Florian Madinger Willich (died 1804), German medical writer August Willich (1810–1878), military officer in the Prussian Army Ehrenfried von Willich (1777–1807), Protestant chaplain Jodocus Willich (1501 or c. 1486–1552), German physician and writer Martin Willich (1945–2026), German jurist, politician and manager Quirin op dem Veld von Willich (died 1537), Roman Catholic prelate