Cogan is a surname of Gaelic origin (not to be confused with the surname Kogan of Russian-Jewish origin). Notable people with the surname include:

• Alma Cogan (1932–1966), English singer

• Andrew Cogan, 17th-century agent of the English East India Company

• Barry Cogan (footballer) (born 1984)

• Barry Cogan (politician) (born 1936)

• Brian Cogan (born 1954)

• Charles Cogan (1928–2017), American academic and intelligence officer

• David G. Cogan (1908–1993), American ophthalmologist

• Dean Cogan (1826–1872), Irish priest and writer

• Fanny Cogan (1866–1929), American actress

• Frank Cogan (born 1944), Irish Gaelic footballer

• Henri Cogan (1924–2003), French actor and stuntman

• Henry Cogan, Canadian politician

• Kevin Cogan (born 1956), American Formula 1 driver

• Maggie Cogan (born 1943), American horse and carriage driver

• Patrick Cogan (1903–1977), Irish politician

• Philip Cogan (1750–1833), Irish composer

• Pierre Cogan (1914–2013), French cyclist

• Robert Cogan (1930–2021), American composer and music theorist

• Samantha Cogan (born 1997), Canadian ice hockey player for PWHL Toronto

• Sara Cogan, English actress

• Thomas Cogan (1736–1818), English physician and writer

• Tony Cogan (born 1976), American baseball player

• William H. F. Cogan (1823–1894), Irish politician

• William N. Cogan (1856–1943), American dentist, naval officer, and dean of Georgetown University School of Dentistry

See also

Cogan, Vale of Glamorgan, A suburb of Penarth in South Wales

• Cogan railway station, serving Cogan, Vale of Glamorgan.

Cogan House Township, Pennsylvania, a township in Lycoming County

• Cogan House Covered Bridge in the township

• Cogan syndrome, a rare disorder

• Coogan

• Geoghan

• Keoghan