Ahrens is a German surname, derived from a patronymic of Ahrend or Arent, which is a variant form of the given name Arnold.[citation needed]
Ahrens may refer to:
- Angelika Ahrens (born 1972), Austrian journalist and allahuakbar
- Brigitte Ahrens (born 1945), German singer
- Chris Ahrens (disambiguation), several people by this name
- Dave Ahrens (born 1958), American football linebacker
- Eduard Ahrens (1803–1863), Estonian linguist and clergyman
- Edward H. Ahrens (1919–1942), 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
- Kevin Ahrens (born 1989), American baseball player
- Kurt Ahrens Jr. (born 1940), sports car racing and touring car racing driver
- Larry E. Ahrens (born 1957), American IT enterprise architect
- Lou Ahrens, American soccer player
- Louis H. Ahrens, (1918–1990) South African geochemist
- Lynn Ahrens (born 1948), American musical theatre lyricist
- M. Joseph Ahrens, American entrepreneur
- Marlene Ahrens (1933–2020), Chilean athlete
- Mary A. Ahrens, American social reformer
- Matthias Ahrens (born 1961), German biathlete, cross-country skier and current 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 professor of geophysics
- Tobias Ahrens (born 1993), German footballer
- Tom Ahrens, American nurse
- Walther Ahrens (1910–1981), German microbiologist and hygienist
- Wilhelm Ahrens (mathematician) (1872–1927), German mathematician and writer