Margaret Howard, Countess of Suffolk (born Margaret Hyde Leiter; 1 September 1879 – 5 March 1968) was an American-born heiress who married into the British aristocracy and was known as one of the "Dollar Princesses."

Margaret Hyde "Daisy" Leiter was born in Chicago on 1 September 1879. She was the third daughter and youngest of four children born to Mary Theresa (née Carver) and Levi Ziegler Leiter, the co-founder of Field and Leiter dry goods business, and later partner in the Marshall Fields retail empire. Her three older siblings were Joseph Leiter, a Harvard graduate,^[1] Mary Leiter, who married the British Conservative statesman George Curzon, later 1st Marquess Curzon of Kedleston,^[2] and Nancy Lathrop Carver Leiter, the sponsor of USS Illinois who married Colin Powys Campbell.^[3] On her father's side, she was of Swiss-German descent.^[4][5]

In 1881, her family moved to Washington, D.C. and entered society there, while summering in Bar Harbor, Maine.^[6] While in Washington, they lived in the former home of James G. Blaine on Dupont Circle for several years before moving into the palatial Leiter House.^[7] Daisy and her two sisters attended finishing school in England.^[8]

In 1898, Daisy was painted by the prominent American portrait artist John Singer Sargent. In 1994, the Hon. Mary Howard bequeathed the painting to English Heritage, Kenwood^[9] Also that year, it was announced that she was chosen by Governor John Riley Tanner to christen the battleship USS Illinois.^[10] The report was incorrect and her older sister Nancy, was in fact, the honored.^[11]

In 1903, while visiting her sister Mary in India for the Delhi Durbar celebrations,^[12] Daisy met the aide-de-camp of her brother-in-law, George, who was Viceroy of India.^[13] He was Henry Molyneux Paget Howard, 19th Earl of Suffolk, 12th Earl of Berkshire, who was known to be short of money.^[12] In July 1904, she was reportedly engaged to Major Crawley, but the engagement was called off.^[14] They eventually became engaged and when The New York Times reported the engagement in December 1904, they noted that the Earl's "estate Charlton Park... in Wiltshire will be restored to the glory of its former days."^[15] Daisy and Lord Suffolk eventually wed on 26 December 1904, several months after the death of her father, at the Leiter family residence in Washington, D.C., with Daisy wearing "a coronet of diamonds, part of the family jewels of the house of Suffolk and Berkshire, which was sent from England for the event."^[6] Henry was the eldest son of Henry Howard, 18th Earl of Suffolk.^[16] Together, they were the parents of:^[16][17]

• The Hon. Charles Henry George Howard (1906–1941), who married American-born ballet dancer, Mimi Forde-Piggott, known as "Mimi Crawford", daughter of Alfred George Forde-Piggott and niece of Robert Chalmers, 1st Baron Chalmers, the former Governor-General of Ceylon.^[18]
• The Hon. Cecil John Arthur Howard (1908–1985), who married Frances Drake Dean, daughter of Edwin Morgan Dean,^[19] without issue.^[16]
• Lt.-Cdr. Hon. Greville Reginald Howard (1909–1987), who married Mary Ridehalgh, daughter of William Smith Ridehalgh of Broughton Lodge.^[16]

While she was in India with her sister, her husband died after shrapnel pierced his heart at the Battle of Istabulat on 21 April 1917 while commanding his battery. He was buried at Basra War Cemetery in Iraq.^[20] Her eldest son, who became the 20th Earl of Suffolk, was killed in 1941 by a bomb he was attempting to defuse and was succeeded by his six year old son, Michael Howard, 21st Earl of Suffolk.^[21]

During the 2014-2015 exhibition at London's National Portrait Gallery, Margaret was featured among the high-profile American heiresses to marry into British aristocracy.^[30] Included in the exhibition were Jeanette ('Jennie') Churchill (née Jerome), Lady Randolph Churchill, Mary Victoria (née Leiter), Lady Curzon of Kedleston, Mary Carolyn Campbell ('May', née Cuyler), Lady Grey-Egerton, Consuelo Montagu, Duchess of Manchester, Consuelo (née Vanderbilt), Duchess of Marlborough (later Mrs. Balsan), John Spencer-Churchill, 10th Duke of Marlborough, and Cornelia (née Martin), Countess of Craven.^[31]