Mary I (1516–1558) was Queen of England and Ireland 1553–1558.
Mary I may also refer to: Mary I, Countess of Menteith (13th century) Mary, Queen of Hungary (1371–1395) Mary, Duchess of Burgundy (1457–1482) Mary, Queen of Scots (1542–1587), Mary I of Scotland Maria I of Portugal (1734–1816) Mary Immaculate College or Mary I, a college in Limerick, Ireland
See also Queen Mary (disambiguation)