Jeralean Talley, who was born May 23, 1899, went fishing last year and still gets around on her own with the help of a walker.
The Inkster resident plans to celebrate with family and friends at a local church on Sunday.
On her actual birthday – Friday – Talley planned to go to the doctor for a checkup, although she says she doesn't feel sick.
But Talley's knees occasionally hurt, her right hand shakes, she has a hard time hearing and her memory comes and goes.
Kimberly P. Mitchell / Detroit Free Press / AP
"It's all in the good Lord's hands," Talley told the Detroit Free Press. "There's nothing I can do about it."
Talley is the oldest living American and the second-oldest person in the world, according to a list maintained by the Gerontology Research Group, which tracks the world's longest-living people.
The Gerontology Research Group verified Talley's age using census data. Japan resident Misao Okawa, 116, tops the list.
Talley, whose husband died in 1988, is cared for by a 76-year-old daughter who lives with her.
Five generations of the family are living in the area, including a great-great-grandson.