The Esmonde Baronetcy, of Ballynastragh in the County of Wexford, is a title in the Baronetage of Ireland. It was created on 28 January 1629 for Thomas Esmonde. He raised a cavalry regiment for Charles I and commanded a regiment during the Siege of La Rochelle. Esmonde was the son of Sir Laurence Esmonde, who had abandoned the Roman Catholic faith during the reign of Queen Elizabeth and was raised to the Peerage of Ireland as Baron Esmonde in 1632. Lord Esmonde married firstly a Roman Catholic wife of the O'Flaherty family, and they had a son, Thomas, the first Baronet. She feared that the boy would be raised a Protestant and ran away with him, raising him as a strict Roman Catholic. As Thomas's father would not admit his legitimacy, (even though his father had no son by his second marriage) he was not allowed to succeed to the barony, which became extinct on his father's death in 1646. He did however gain possession of the family estates in County Wexford.
Several of the later baronets enjoyed distinguished political careers. The ninth and tenth Baronets represented Wexford and County Waterford respectively in the House of Commons, the ninth additionally serving as High Sheriff of Wexford in 1840. The eleventh Baronet was also a Member of Parliament as well as a Senator of the Irish Free State. The twelfth Baronet was Cumann na nGaedheal TD for Wexford from 1923 to 1936. The fourteenth Baronet was Member of Parliament for Tipperary North from 1915 to 1918 and Fine Gael TD for Wexford from 1937 to 1944 and from 1948 to 1951. The fifteenth Baronet was Fine Gael TD for Wexford from 1951 to 1973. The sixteenth Baronet was a Judge and Fine Gael TD for Wexford from 1973 to 1977. John Joseph Esmonde, father of the fourteenth and fifteenth Baronets, was also a politician. Two of his sons from his second marriage also gained prominence. John Witham Esmonde (1907–1983) was a Captain in the Royal Navy while Eugene Esmonde was a pilot in the Fleet Air Arm and recipient of the Victoria Cross.
The family seat is Ballynastragh, Gorey, County Wexford.