When Minnie Sela Couch was born on 13 January 1890, in Belle Fourche, Butte, South Dakota, United States, her father, George Washington Couch, was 41 and her mother, Mary Ann Leslie, was 34. She married John Roberts Wills on 24 June 1906. They were the parents of at least 1 son and 3 daughters. She lived in Billings, North Dakota, United States in 1920 and Golden Valley, North Dakota, United States in 1925. She died on 5 December 1976, in Belle Fourche, Butte, South Dakota, United States, at the age of 86, and was buried in Pine Slope Cemetery, Belle Fourche, Butte, South Dakota, United States.