|Earldom of Dysart|
|Creation date||3 August 1643|
|Monarch||King Charles I|
|Peerage||Peerage of Scotland|
|First holder||William Murray|
|Present holder||John Peter Grant of Rothiemurchus, 13th Earl|
|Heir apparent||James Patrick Grant, Lord Huntingtower|
|Remainder to||2nd Countess's heirs of the body lawfully begotten, failing which to her heirs whatsoever|
|Subsidiary titles||Lord Huntingtower|
Earl of Dysart (pronounced //) is a title in the Peerage of Scotland. It was created in 1643 and has been held continuously since then by descendants of the 1st Earl, William Murray.
The title was created in 1643 for William Murray, who had earlier represented Fowey and East Looe in the English House of Commons. He was made Lord Huntingtower at the same time, also in the Peerage of Scotland. William Murray had been a lifelong friend of King Charles I, in fact having been his whipping boy while the latter was Prince of Wales.
Murray was succeeded by his daughter, Elizabeth, the 2nd Countess. In 1670 she resigned the peerage and received a new grant thereof by patent with precedency of her father, and with remainder to her heirs of the body, failing which to her heirs whatsoever. Lady Dysart married, firstly, Sir Lionel Tollemache, 3rd Baronet (see Tollemache baronets for the earlier history of this title), and, secondly, John Maitland, 1st Duke of Lauderdale. She was succeeded by her son from her first marriage, Lionel, the 3rd Earl, who had already succeeded his father as 4th Baronet. Lord Dysart notably represented Orford and Suffolk in the House of Commons and served as Lord-Lieutenant of Suffolk, but declined the offer of an English barony. His son, Lionel Tollemache, Lord Huntingtower pre-deceased him and the title was inherited by his grandson, Lionel Tollemache, 4th Earl of Dysart in 1727. The 4th Earl was elected High Steward of Ipswich and Knight of the Thistle. The title passed to the 4th Earl's eldest son, Lionel, who became 5th Earl in 1770. The 5th Earl died without issue in 1799 and the title passed to his brother, Wilbraham, former Member of Parliament for Northampton and Liskeard, who became the 6th Earl at the age of 60.
With no direct descendants the Tollemache baronetcy became extinct on Wilbraham's death in 1821. The Scottish titles were inherited by the 5th and 6th Earls' sister, Louisa Tollemache, the 7th Countess, widow of John Manners, then aged 75. On succeeding to the titles Lady Dysart assumed by Royal licence the surname and arms of Tollemache (or Talmash).
Louisa's eldest son and heir apparent, William Tollemache, Lord Huntingtower, was created a Baronet, of Hanby Hall in the County of Lincoln, in the Baronetage of Great Britain in 1793. However, he predeceased his mother and Lady Dysart was succeeded by her grandson, Lionel the 8th Earl (the son of Lord Huntingtower), who had already succeeded his father as 2nd Baronet. Lionel represented Ilchester in Parliament 1827–30. Lionel's son, William Tollemache, Lord Huntingtower, predeceased him in 1872 and, on his death in 1878, was succeeded by his grandson, William, the 9th Earl, Lord-Lieutenant of Rutland.
On the death of the 9th Earl the baronetcy and Scottish peerages separated. The baronetcy was inherited by a male heir, Lyonel, (see Tollemache Baronets for later history of this title) while the lordship and earldom passed to his niece Wynefryde Agatha, the 10th Countess (1889–1975). She was the daughter of Agnes Mary Manners Talmash (sister of the 9th Earl) and her husband Charles Norman Lindsay Tollemache Scott.
Lady Dysart married Owain Edward Whitehead Greaves and was succeeded in 1975 by their eldest daughter Rosamund Agnes Greaves (1914–2003), the 11th Countess. In 2003 her sister Katherine Grant of Rothiemurchus (1918–2011), the widow of Lieutenant-Colonel John Peter Grant of Rothiemurchus MBE, became the 12th Countess. As of 2021[update] the titles are held by her only son, the 13th Earl, who succeeded his mother in 2011.
The family seat is now The Doune of Rothiemurchus, near Aviemore, Inverness-shire.
The heir apparent is the present holder's only son, James Patrick Grant of Rothiemurchus, Lord Huntingtower (b. 1977).
The heir apparent's heir apparent is his son, John Peter Grant of Rothiemurchus, Master of Huntingtower (b. 2011).