Claussen is a surname. Notable people with the surname include:
Athletes Brandon Claussen (born 1979), American baseball player Georg Claussen (1895–1967), Danish cyclist Hans Claussen (1911–2001), German weightlifter Simon Claussen (born 1991), Norwegian sport shooter
Artists Amalie Claussen (1859–1950), Danish photographer Gro Pedersen Claussen (born 1941), Norwegian graphic designer James Claussen, American lithographer and painter Sophus Claussen (1865–1931), Danish poet
Performers Frank Claussen (born 1976), Norwegian guitarist Julia Claussen (1879–1941), Swedish mezzo-soprano
Political figures Andreas Claussen (1883–1957), Norwegian barrister, civil servant and politician Bruno Claußen (1884–?), German lawyer, civil servant and business executive Claus Christian Claussen (born 1961), German politician (CDU) Eileen Claussen (born 1945), President of the Center for Climate and Energy Solutions George C. Claussen (1882–1948), Justice of the Iowa Supreme Court Otto Claussen Iberri (born 1964), Mexican politician Peter H. Claussen (1894–1990), American politician from Nebraska
Religious leaders Geoffrey Claussen, American rabbi (born 1964), German Protestant theologian, church cultural representative, and author
Scientists Claus-Frenz Claussen (1939–2022), German neurotologist
Businesses Claussen pickles Claussen and Claussen, architecture firm
Sites Claussen's Bakery, historic site in Columbia, South Carolina Claussen House, historic site in Florence, South Carolina William Claussen House, historic site in Davenport, Iowa
See also Clausen