Gertrude Baines (April 6, 1894 – September 11, 2009) was an American supercentenarian, aged &0000000000000115.000000115 years, &0000000000000158.000000158 days, who was the oldest living person in the world according to Guinness World Records, from the January 2, 2009 death of Portuguese woman Maria de Jesus, until her own death.

Baines lived in Los Angeles. Just before her 115th birthday, Baines was hospitalized and treated for dehydration, but she made a quick recovery. Aside from her arthritis and inability to walk, Baines was in good health until age 115.

Born in Shellman, Georgia, Baines was the third daughter of Jordan (1863–October 23, 1921) and Amelia "Amy" (Daniel) Baines, who were married in Terrell County, Georgia on January 1, 1887. She recalled that her earliest memory was that of a car ride to Canada.