User:Canuckian89/United States First Ladies

This is a list of First Ladies of the United States by age. Where the person in question is still living, the longevity is calculated up to.

List by longevity
To allow for the differing number of leap years occurring within the life of each First Lady or wife, two measures of longevity are given. The first column is the number of days between date of birth and date of death, allowing for leap days; the second column breaks this number down into years and days, with the years being the number of whole years the First Lady or wife lived, and the days being the remaining number of days after her last birthday. The current oldest living first lady is Nancy Reagan.