Background
Galloway was the eldest son of Randolph Stewart, 9th Earl of Galloway, and Lady Harriett Blanche, daughter of Henry Somerset, 6th Duke of Beaufort.
Galloway was the eldest son of Randolph Stewart, 9th Earl of Galloway, and Lady Harriett Blanche, daughter of Henry Somerset, 6th Duke of Beaufort.
He was educated at Harrow.
He played first-class cricket for the Marylebone Club between 1858 and 1864. The latter year he succeeded his father in the earldom and entered the House of Lords. In 1887 he was appointed a Knight of the Thistle.
Lord Galloway married Lady Arabella Arthur, daughter of James Gascoyne-Cecil, 2nd Marquess of Salisbury, in 1872 (he was consequently the brother-in-law of Prime Minister Robert Gascoyne-Cecil, 3rd Marquess of Salisbury).
The marriage was childless. Lady Galloway died in August 1903.
On 14 October 1889, The Earl of Galloway appeared in Dumfries Sheriff Court on a charge of indecent behaviour towards a young girl. He was found "not guilty".
See The Scotsman (1860–1920) dated 15 October 1889.
On 23 January 1890, the Earl of Galloway appeared again in court, Glasgow Central Police Court, charged with having been "riotous, disorderly or indecent" in his behaviour, by accosting, following and molesting Margaret Brown and one or more female passengers. The charge was found "not proven". See Scotsman (1860–1920) dated 24 January 1890.
Galloway sat as Member of Parliament for Wigtownshire between 1868 and 1873.