Barbara Sidney, Countess of Leicester

Barbara Sidney, Countess of Leicester (1563–1621) was a Welsh heiress, and the first wife of Robert Sidney, 1st Earl of Leicester.

Barbara Sidney and her six children

Barbara Gamage inherited Coity Castle, Glamorgan, on the death of her father, John Gamage, in 1584, and became the ward of Sir Edward Stradling of St Donat's Castle, Glamorgan, until her marriage. On 23 September 1584, she married Robert Sidney at St Donat's, the home of her guardian. Although Sidney was MP for Glamorgan, the couple lived chiefly at Baynard's Castle in London and Penshurst Place in Kent. They had eleven children.

• Sir William Sidney
• Henry Sidney
• Philip Sidney
• Mary
• Robert Sidney, 2nd Earl of Leicester
• Catherine
• Philippa
• Barbara
• Dorothy
• Elizabeth
• Bridget