Ahrens or Ahrends is a German surname, derived from a patronymic of Ahrend or Arent, which is a variant form of the given name Arnold.

Ahrens may refer to:

Adolf Ahrens (1897–1957), German politician Alfred Emanuel Ahrens, Canadian politician Brigitte Ahrens (born 1945), German singer Chris Ahrens (disambiguation), several people by this name Dave Ahrens (born 1958), American football player Eduard Ahrens (1803–1863), Estonian linguist and clergyman Edward H. Ahrens (1919–1942), US Navy Cross recipient Franz Heinrich Ludolf Ahrens (1809–1881), German philologist Gaby Ahrens (born 1981), Namibian sport shooter Heinrich Ahrens (1808–1874), German philosopher and jurist Janette Ahrens (1925–2016), American figure skater Joseph Ahrens (1904–1997), German composer and organist Karl Ahrens (1924–2015), German politician Kevin Ahrens (born 1989), American baseball player Kurt Ahrens Jr. (born 1940), racing car driver Lou Ahrens, American soccer player Louis H. Ahrens, (1918–1990) South African geochemist Lynn Ahrens (born 1948), American musical theatre lyricist Mariella Ahrens (born 1969), German actress Marlene Ahrens (1933–2020), Chilean athlete Mary A. Ahrens, American social reformer Matthias Ahrens (born 1961), German biathlete, cross-country skier and coach Nick Ahrens (born 1983), American designer and art director Rene Ahrens, Australian Paralympic athlete and wheelchair basketballer Robert Ahrens (born 1970), American film and theatrical producer Sieglinde Ahrens (born 1936), German organist Silvia Poll Ahrens (born 1970), Nicaraguan-born swimmer Thomas Ahrens (rowing) (born 1948), German coxswain Thomas J. Ahrens (1936–2010), American geophysicist Tom Ahrens, American nurse Wilhelm Ahrens (1872–1927), German mathematician and writer

See also Ahrens v. Clark, a United States Supreme Court case Angela Ahrendts (born 1960), US businesswoman Arent Arentsz (1585–1631), Dutch painter Ahrén Ahrend Ahrendt Arend Arends Arent Arents