The castle is believed to have been established by Norse settlers in the area in the 11th century.
Wars of Scottish Independence
During the Wars of Scottish Independence the castle was garrisoned by the forces of king Edward I of England. However it was later captured by Scottish forces for king Robert I of Scotland (Robert the Bruce) led by Uilleam II, Earl of Ross.
From the castle, the Earl of Ross (chief of Clan Ross) led the men of Ross to fight against the English at the Battle of Bannockburn in 1314. As a reward in 1321 King Robert granted Dingwall Castle with the town and lands of Dingwall to the Earl of Ross.
Murder in the Castle
In 1370 a feud arose between William de Moravia, 5th Earl of Sutherland (chief of Clan Sutherland) and Iye Mackay, 4th of Strathnaver (chief of Clan Mackay). A meeting was arranged for them to meet at Dingwall Castle to resolve their issues. However Iye Mackay and his son Donald Mackay were both murdered in the castle while they were asleep by Nicholas Sutherland, brother of the Earl of Sutherland.
Sometime at the beginning of the 15th century a duel is said to have taken place between the governor of the castle, who had been appointed by Robert Stewart, Duke of Albany and Thomas Munro, brother of Hugh Munro, 9th Baron of Foulis (chief of Clan Munro). The two met at the village of Maryburgh and after an argument dirks were pulled and a duel took place in which Thomas Munro killed the governor of Dingwall Castle. The Scottish Castles Association states that the new governor of the castle was "assassinated" by one of the Munroes and replaced by a Mackay.
Lord of the Isles occupation
In 1411 Domhnall of Islay, Lord of the Isles (chief of Clan Donald) captured Dingwall Castle as part of his attempt to seize the title of the Earldom of Ross. This took place shortly before the Battle of Harlaw.
In 1438 the next successive Clan Donald chief, Alexander of Islay, Earl of Ross was officially recognised as the Earl of Ross and took up his residence at Dingwall Castle. His son, John of Islay, Earl of Ross was not as successful; the Earldom of Ross was confiscated from him and the castle became a royal possession once more in 1475. John Munro, 11th Baron of Foulis was then made governor of the castle, who in turn was succeeded by Andrew Munro, 2nd of Milntown. The next governor in 1488 was Sir James Dunbar.
In 1507 Andrew Stewart, Bishop of Caithness carried out improvements after the castle had been assaulted by the MacDonalds and Mackenzies. Later governors were John Stewart, 2nd Earl of Atholl (1516 - 1522), John Earl of Moray - brother of king James V of Scotland, David Sinclair - until 1550, George Munro, 4th of Milntown also known as "of Docharty" in 1561, Sir Andrew Keith (Lord Dingwall) in 1584, Sir John Preston Earl of Desmond in 1605.
The Crown abandoned Dingwall Castle in about 1600 and it eventually fell into a ruin. The castle ceased to be maintained after the death of king James VI of Scotland in 1625.  It was used as a quarry until 1817 when it was finally levelled and only a few fragments remain.
A tunnel still exists that runs from the site of Dingwall Castle to the basement of nearby Tulloch Castle. The tunnel has now collapsed, but it is possible to view this passageway through an air vent on the front lawn of Tulloch Castle's grounds.
- David MacDonald. "A Bríef History of Dingwall". Dingwall Website. Retrieved 15 November 2010.
- History of the House and Clan of Mackay by Robert Mackay (1829), p.47: Quoting A Genealogical History of the Earldom of Sutherland by Sir Robert Gordon (1580–1656).
- Mackenzie, Alexander. (1898). History of the Munros of Fowlis p. 12.
- Scottish Castles Association. "Dingwall Castle at the Association for Scottish Castles". www.scottishcastlesassociation.com. Retrieved 31 March 2012.
- Anderson, William (1862), The Scottish nation: or, The surnames, families, literature, honours, and biographical history of the people of Scotland, Fullarton, p. 37-8.