Nancy Davis (1921–2016) was an American actress and, as Nancy Reagan, First Lady of the United States. Nancy Davis may also refer to: Nancy D. Griffeth (Nancy Davis Griffeth, born 1945), American computer scientist Jan Davis (Nancy Jan Davis, born 1953), American astronaut Nancy Davis (businesswoman) (born c. 1977), American investor and businesswoman See also Nan Davis (born 1962), American champion long-distance runner, a/k/a Nan Doak-Davis