纳尔逊·艾格林（Nelson Algren，1909年3月28日－1981年5月9日），美国作家。

出生于底特律，曾偷货车流浪过，坐过牢，离过婚，定居芝加哥，专事写作，以描写贫民窟为主。1947年法国女作家西蒙·波娃访美时认识了美国情人艾格林（这段故事可见于《西蒙波娃的美国纪行》），两人一见倾心，波娃形容他“如同拳击手般粗率”，他带她去臭名昭彰的酒吧，见识了小偷、毒贩、妓女。回到法国之后，西蒙·波娃开始与艾格林通信，她手上戴着一枚银戒子，到死也没有摘下来。初识艾格林时，正是西蒙·波娃积极创作《第二性》的时候，他们曾两度出国长期旅行。

Nelson Algren (March 28, 1909 – May 9, 1981) was an American writer. He may be best known for The Man with the Golden Arm, a 1949 novel that won the National Book Award and was adapted as a 1955 film of the same name.

According to Harold Augenbraum, "in the late 1940s and early 1950s he was one of the best known literary writers in America." The lover of French writer Simone de Beauvoir, he was featured in her novel The Mandarins, set in Paris and Chicago.