There are a number of saints named Margaret so you need to be specific.
Saint Margaret of Fontana died in 1513.
Saint Margaret of England died in 1192.
If your talking about Saint Margaret Mary, then she died in 1690.
Margaret Young died in 1969.
Saint Margaret of Hungary died on 1271-01-18.
Margaret Young Taylor died on 1919-05-03.
St Margaret of Scotland died on 16 November, 1093.
Saint Margaret of England, O.Cist., (died 1192) was born in Hungary to an Englishwoman who was related to St. Thomas Beckett.
St. Margaret, Queen of Scotland was born in 1045 in Hungary, and died 16 November 1093 in Edinburgh Castle in Scotland. She was 48 years old.
Saint Margaret Mary Alacoque died on October 17, 1690, of natural causes.
Little is known about this saint. We do not even know what century she lived and died, reportedly by beheading.
Margaret Ball is not a saint. She has been beatified, however.