Jacques Alexandre Bernard Law, marquis de Lauriston (; 1 February 1768 – 12 June 1828) was a French soldier and diplomat of Scottish and Portuguese descent, and a general officer in the French Army during the Napoleonic Wars. He was born in Pondicherry in French India, where his father, Jean Law de Lauriston, was Governor-General. Jean Law de Lauriston was a nephew of the financier John Law. Jacques' mother was a member of the Carvallho family of Portuguese traders.
Lauriston Castle, in Scotland, was inherited by John Law in 1729. Lauriston is one of the names inscribed on the Arc de Triomphe.
Early career
Lauriston obtained his first commission about 1786, served with the artillery and on the general staff during the early campaigns of the Revolution, and became brigadier of artillery in 1795. Resigning in 1796, he was brought back into the service in 1800 as aide-de-camp to Napoleon, with whom, as a cadet, Lauriston had been on friendly terms. In the years immediately preceding the first empire, Lauriston was, successively, director of the La Fère artillery school and special envoy to Denmark before being selected to convey to England the ratification of the Peace of Amiens in 1802.
In 1805, having risen to the rank of general of division, he took part in the war against Austria. He occupied Venice and the Republic of Ragusa in 1806, was made governor-general of Venice in 1807, took part in the Erfurt negotiations of 1808, was ennobled as a count, and served with the emperor during the Peninsular War in Spain (1808–1809), where he commanded the division that besieged and won Pamplona. He fought under Viceroy Eugène de Beauharnais at the Battle of Raab in the Italian campaign and the subsequent advance to Vienna.
thumb|250px|[[Napoleon and Lauriston in Moscow – an unflattering painting by Vasily Vereshchagin, representing a Russian point of view]]
In 1811, Lauriston was made ambassador to Russia. In 1812, he held a command in the Grande Armée and gained distinction through his firmness in covering the retreat from Moscow. He commanded the V Corps at Lützen and Bautzen during the German campaign, but was captured during the disastrous retreat after the Battle of Leipzig in October 1813.