1245.

In 1649, Gaels from Ireland, led by Donald Macalister Mullach, attacked Thurso and were chased off by the residents, headed by Sir James Sinclair. One of the locals, a servant of Sinclair was said to have killed Mullach by "cutting a button from his master's coat and firing it from a musket". In 1811, the parish had 592 houses with a population of 3,462. This had decreased to 2,510 people by 1841. Following the passage into law of the 1845 Poor Law Act, a combination poorhouse