Sir Thomas de Rokeby was a 15th century English soldier, Knight of the Shire and High Sheriff of Yorkshire.

He was born into a well-known north Yorkshire family with a seat at Mortham on the banks of the Tees.

In 1405 he served a short term as High Sheriff of Northumberland

High Sheriff of Northumberland

This is a list of the High Sheriffs of the English county of Northumberland.The High Sheriff is the oldest secular office under the Crown. Formerly the High Sheriff was the principal law enforcement officer in the county but over the centuries most of the responsibilities associated with the post...

. In 1406 he was then called to Parliament as Knight of the Shire for Yorkshire

Yorkshire (UK Parliament constituency)

Yorkshire was a constituency of the House of Commons of the Parliament of England from 1290, then of the Parliament of Great Britain from 1707 to 1800 and of the Parliament of the United Kingdom from 1801 to 1832...

 and served as High Sheriff of Yorkshire

High Sheriff of Yorkshire

The High Sheriff of Yorkshire was an ancient High Sheriff title originating in the time of the Angles, not long after the invasion of the Kingdom of England, which was in existence for around a thousand years. A list of the sheriffs from the Norman conquest onwards can be found below...

 in 1407 and again in 1411. During his first term as High Sheriff Henry Percy, 1st Earl of Northumberland

Henry Percy, 1st Earl of Northumberland

Henry Percy, 1st Earl of Northumberland, 4th Baron Percy, titular King of Mann, KG, Lord Marshal was the son of Henry de Percy, 3rd Baron Percy and a descendent of Henry III of England. His mother was Mary of Lancaster, daughter of Henry, 3rd Earl of Lancaster, son of Edmund, Earl of Leicester and...

 marched into Yorkshire against Henry IV of England

Henry IV of England

Henry IV was King of England and Lord of Ireland . He was the ninth King of England of the House of Plantagenet and also asserted his grandfather's claim to the title King of France. He was born at Bolingbroke Castle in Lincolnshire, hence his other name, Henry Bolingbroke...

 and was stopped at Knaresborough by Thomas de Rokeby and a local levy. The two factions met again at the Battle of Bramham Moor

Battle of Bramham Moor

The Battle of Bramham Moor was the final battle in the Percy Rebellion of 1402 – 1408, which pitted the Earl of Northumberland, leader of the wealthy and influential Percy family, against the usurper King of England, King Henry IV...

 where Rokeby was victorious and Percy killed. A grateful king awarded Rokeby the manor of Spofforth, previously the property of the Percys.

He later served in the army of Henry V of England

Henry V of England

Henry V was King of England from 1413 until his death at the age of 35 in 1422. He was the second monarch belonging to the House of Lancaster....

 in France. He fought at the Battle of Agincourt

Battle of Agincourt

The Battle of Agincourt was a major English victory against a numerically superior French army in the Hundred Years' War. The battle occurred on Friday, 25 October 1415 , near modern-day Azincourt, in northern France...

in 1415, was present throughout most of the siege of Rouen in 1418–1419 and marched through Paris in triumph in 1420.

He was MP again for Yorkshire in 1423. He married a daughter of Sir Ralph Eure.