Daniel de Lisle Brock (1762–1842), was Bailiff of Guernsey from 1821 to 1842.
Daniel Brock was born 10 December 1762 at St Peter Port on the Channel Island of Guernsey, the third son of John Brock (1729-1777), a midshipman in the Royal Navy, and Elizabeth de Lisle, daughter of Daniel de Lisle, then Lieutenant-Bailiff of Guernsey. The Brocks were an English family who had been established in Guernsey since the sixteenth century. Daniel was a nephew of William Brock (1725-1768), of Brockhurst, St Peter Port (now owned by the National Trust of Guernsey), who was married to Judith de Beauvoir; and Henry Brock, who was married to Susan, sister of Admiral James Saumarez, 1st Baron de Saumarez. Daniel was one of fourteen children, ten of whom attained maturity. He was an elder brother of Major-General Sir Isaac Brock.
After such schooling as the island afforded in those days, he was placed at Alderney to learn French under the tuition of M. Vallat, a Swiss pastor, afterwards rector of St. Peter-in-the-Wood, Guernsey, and subsequently at a school at Richmond, Surrey.
He was, however, taken away at the age of fourteen to accompany his father, who was in failing health, to France, where the latter died at Dinan. He spent about twelve months in visiting the Mediterranean, Switzerland, and France, in 1785-6,
Twelve years later, in 1798, at the age of 36, he was elected a jurat of the royal court of Guernsey, from which time his name is intimately associated with the history of his native place and its independence from the England.
On four separate occasions, between 1804 and 1810, he was deputed by the states and Royal Court of Guernsey to represent them in London, in respect of certain measures affecting the trade and ancient privileges of the island. The third occasion was to defend against the Royal Navy trying to imress island men, this was argued in opposition to his brother-in-law, Admiral James Saumarez.