Posen is a surname. Notable people with the surname include:
Al Posen (1894-1960), American cartoonist Adam Posen (born 1966), American economist Ariel Posen, Canadian musician Barry Posen (born 1952), professor of political science at MIT Louis Posen (born 1971), American music producer Mika Posen, Canadian violinist and music instructor Shelley Posen (active since 1970s), Canadian folklorist and folk musician Stephen Posen (born 1939), American painter, recipient of a Guggenheim Fellowship in 1986 Zac Posen (born 1980), American fashion designer
See also Posener Posner