Earl Darlington is in Earldoms of England Alphabetically, Earldoms of England Chronologically, Extinct Earldoms of England.
Summary
1754. Henry Vane 1st Earl Darlington [aged 49] created.
6th March 1758. Son Henry Vane 2nd Earl Darlington [aged 31] succeeded.
10th September 1792. Son William Henry Vane 1st Duke Cleveland [aged 26] succeeded.
28th January 1842. Son Henry Vane 2nd Duke Cleveland [aged 54] succeeded.
18th January 1864. Son William Vane 3rd Duke Cleveland [aged 71] succeeded.
6th September 1864. Son Harry George Powlett 4th Duke Cleveland [aged 61] succeeded.
21st August 1891. Harry George Powlett 4th Duke Cleveland extinct.
In 1754 Henry Vane 1st Earl Darlington [aged 49] was created 1st Earl Darlington, 1st Viscount Barnard. Grace Fitzroy Countess Darlington [aged 56] by marriage Countess Darlington.
On 6th March 1758 Henry Vane 1st Earl Darlington [aged 53] died. His succeeded son Henry [aged 31] succeeded 2nd Earl Darlington, 2nd Viscount Barnard, 4th Baron Barnard. Margaret Lowther Countess Darlington [aged 30] by marriage Countess Darlington.
On 10th September 1792 Henry Vane 2nd Earl Darlington [aged 65] died at Raby Castle, County Durham [Map]. He was buried at Raby Castle, County Durham [Map]. His succeeded son William [aged 26] succeeded 3rd Earl Darlington, 3rd Viscount Barnard, 5th Baron Barnard. Catharine Margaret Powlett Countess Darlington [aged 26] by marriage Countess Darlington.
Monument to Henry Vane 2nd Earl Darlington at St Mary's Church, Staindrop [Map] sculpted by Richard Cooke.
The armorial being 
Vane Arms impaled with 
Lowther Arms.
Catharine Margaret Powlett Countess Darlington: In 1766 she was born to Harry Powlett 6th Duke Bolton and Katherine Lowther Duchess of Bolton. On 17th September 1787 William Henry Vane 1st Duke Cleveland and she were married at her father's seat Hackwood Park, Hampshire. She the daughter of Harry Powlett 6th Duke Bolton and Katherine Lowther Duchess of Bolton. He the son of Henry Vane 2nd Earl Darlington and Margaret Lowther Countess Darlington. They were first cousins. He a great x 2 grandson of King Charles II of England Scotland and Ireland. On 17th June 1807 Catharine Margaret Powlett Countess Darlington died at Cleveland House.
On 28th January 1842 William Henry Vane 1st Duke Cleveland [aged 75] died. He was buried at St Mary's Church, Staindrop [Map]. His succeeded son Henry [aged 54] succeeded 2nd Duke of Cleveland, 2nd Marquess of Cleveland, 4th Earl Darlington, 4th Viscount Barnard, 6th Baron Barnard, 2nd Baron Raby of Raby Castle in County Durham. Sophia Paulett Duchess of Cleveland [aged 56] by marriage Duchess of Cleveland.
On 18th January 1864 Henry Vane 2nd Duke Cleveland [aged 76] died at the parish of St George's Church, Hanover Square. His succeeded brother William Vane 3rd Duke Cleveland [aged 71] succeeded 3rd Duke of Cleveland, 3rd Marquess of Cleveland, 5th Earl Darlington, 5th Viscount Barnard, 7th Baron Barnard, 3rd Baron Raby of Raby Castle in County Durham. Grace Caroline Lowther Duchess of Cleveland by marriage Duchess of Cleveland.
On 6th September 1864 William Vane 3rd Duke Cleveland [aged 72] died. His succeeded brother Harry [aged 61] succeeded 4th Duke of Cleveland, 4th Marquess of Cleveland, 6th Earl Darlington, 6th Viscount Barnard, 8th Baron Barnard, 4th Baron Raby of Raby Castle in County Durham. Catherine Lucy Wilhelmina Stanhope Duchess of Cleveland [aged 45] by marriage Duchess of Cleveland.
On 21st August 1891 Harry George Powlett 4th Duke Cleveland [aged 88] died at Cleveland House, 16 St James' Square, St James'. Duke of Cleveland, Marquess of Cleveland, Earl Darlington and Viscount Barnard, Baron Raby of Raby Castle in County Durham extinct.
Henry de Vere Vane 9th Baron Barnard [aged 37] succeeded 9th Baron Barnard. Catherine Sarah Cecil Baroness Barnard [aged 30] by marriage Baroness Barnard.