Gloria Hemingway (born Gregory Hancock Hemingway, November 12, 1931 – October 1, 2001) was an American physician and writer who was the third and youngest child of author Ernest Hemingway. Although she was born a male and lived most of her life publicly as a man, she struggled with her gender identity from a young age. In her 60s, she underwent gender transition surgery, and preferred the name Gloria when possible.

A good athlete and a crack shot, she longed to be a typical Hemingway hero and trained as a professional hunter in Africa, but her alcoholism prevented her from gaining a license, and it ultimately cost her her medical license in the United States. Hemingway maintained a long-running feud with her father, stemming from a 1951 incident when her arrest for entering a bar in drag caused an argument between Ernest and Gloria's mother Pauline Pfeiffer. Pfeiffer died from a stress-related condition the following day, which Ernest blamed on Gloria.

In 1976, she authored a bestselling memoir of her father, Papa: A Personal Memoir, which was seen by some to reflect troubles of her own. These included wearing women's clothes, which she ascribed to gender dysphoria.