Lorentzen is a common patronymic surname in Denmark and Norway, as well as the name of a few places.
People Lorentzen family, a family of shipping magnates related to the Norwegian royal family. Members include: Øivind Lorentzen (1882–1980), shipping magnate, father of Erling Lorentzen Henriette Bie Lorentzen (1911–2001), Norwegian journalist, humanist, peace activist, feminist Erling Lorentzen (1923–2012), Norwegian shipowner and industrialist, married Princess Ragnhild Princess Ragnhild, Mrs. Lorentzen (1930–2012), Norwegian princess, wife of Erling Lorentzen
Other notable people with the surname include: Christian August Lorentzen (1749–1828), Danish painter Mogens Lorentzen (1892–1953), Danish writer, painter and illustrator Frithjof Lorentzen (1896–1965), Norwegian fencer Gustav Lorentzen (scientist) (1915–1995), Norwegian thermodynamic scientist Sigurd Lorentzen (1916–1979), Norwegian judge and civil servant Annemarie Lorentzen (1921–2008), Norwegian politician Bent Lorentzen (1935–2018), Danish composer Gustav Lorentzen (1947–2010), Norwegian singer-songwriter Ida Lorentzen (born 1951), American–Norwegian artist Indra Lorentzen (born 1956), Norwegian dancer and choreographer Reidar Lorentzen (born 1956), Norwegian javelin thrower Jørgen Lorentzen (born 1956), Norwegian literary scholar and film producer Morten Lorentzen (born 1960), Danish comedian, actor and film director Kristian Pihl Lorentzen (born 1961), Danish politician and author Rune Lorentsen (born 1961), Norwegian wheelchair curler Anne Lorentzen (1963–2013), Norwegian singer and media researcher Jakob Lorentzen (born 1968), Danish organist Ingrid Lorentzen (born 1972), Norwegian ballet dancer Karina Lorentzen (born 1973), Danish politician Peter Lorentzen (born 1983), Norwegian ice hockey player Kasper Lorentzen (born 1985), Danish footballer Lisa Lorentzen (fl. from 1986), Norwegian mathematician Håvard Holmefjord Lorentzen (born 1992), Norwegian speed skater Håkon Lorentzen (born 1997), Norwegian footballer Christine Lorentzen (fl. from 2006), also known as Lore, Danish singer-songwriter
Places Lorentzen, Bas-Rhin, a commune in the Bas-Rhin department in Grand Est, France Château de Lorentzen, a castle in the commune Lorentzen Peak, in Queen Maud Land, Antarctica