Brigadier General Robert James Loyd-Lindsay, 1st Baron Wantage, VC, KCB, VD (17 April 1832 – 10 June 1901) was a British soldier, politician and philanthropist. He was a benefactor to Wantage, and the first chairman and co-founder of the British National Society for Aid to the Sick and Wounded in War (later the British Red Cross Society), for which he obtained the important patronage of Queen Victoria.

Loyd-Lindsay was born in 1832, the second son of Lieutenant General Sir James Lindsay and Anne, daughter of Sir Coutts Trotter, 1st Baronet. His elder brother Coutts Lindsay succeeded his maternal grandfather as second Baronet in 1837 (see Lindsay Baronets). In 1858, he married The Honorable Harriet Sarah Jones-Loyd, the only surviving child and heiress of Samuel Jones-Loyd, 1st and last Baron Overstone, one of the richest men in the country, who endowed the couple with a considerable fortune and the Lockinge Estate near Wantage as a wedding present.

Lindsay fought as a captain in the Scots (Fusilier) Guards during the Crimean War. He was awarded the Victoria Cross for his actions on 20 September 1854 at the Battle of the Alma and 5 November at the Battle of Inkerman. The London Gazette described his actions as follows:

When the formation of the line of the Regiment was disordered at Alma, Captain Lindsay stood firm with the Colours, and by his example and energy, greatly tended to restore order. At Inkerman, at a most trying moment, he, with a few men, charged a party of Russians, driving them back, and running one through the body himself. —London Gazette

Lindsay was personally presented with the Victoria Cross by Queen Victoria at the first VC investiture held at Hyde Park, London, on 26 June 1857.

On 9 November 1858 Lindsay was appointed as Equerry to HRH The Prince of Wales and served as such before resigning on 7 February 1859. The brief period as Equerry was due to his engagement and impending marriage to The Honorable Harriet Sarah Jones Loyd. The couple were then known as Loyd-Lindsay.

Loyd-Lindsay was later involved in the volunteer movement, serving as Colonel of the Royal Berkshire Volunteers, and subsequently Brigadier-General of the Home Counties Brigade. He was one of the first recipients of the Volunteer Officers' Decoration. He was also Lieutenant Colonel of the Honourable Artillery Company from 13 November 1866 to 17 August 1881.

Loyd-Lindsay sat as Conservative Party Member of Parliament for Berkshire from 1865 until 1885 and served under Lord Beaconsfield as Financial Secretary to the War Office between 1877 and 1880. He was appointed a Knight Commander of the Order of the Bath (KCB) in 1881. In 1885, he was elevated to the peerage as Baron Wantage, of Lockinge in the County of Berkshire. He then served as Lord Lieutenant of Berkshire from 1886 until his death. Having been initiated as a Freemason, passed and raised in Malta en route to the Crimea in 1854, he became Provincial Grand Master of Berkshire from 1898 until his death in 1901.