Dupin
Dupin is a French surname. Notable people with the surname include:
- Amantine Lucile Aurore Dupin (1804–1876), more commonly known as George Sand, French writer
 - André Marie Jean Jacques Dupin (1783–1865), French advocate
 - C. Auguste Dupin, a fictional detective
 - Charles Dupin (1784–1873), French Catholic mathematician
 - Jacques Dupin (1927–2012), French poet
 - Louis Ellies Dupin (1657–1719), French ecclesiastical historian
 - Mademoiselle Dupin (1649-1709), French actress