He married, firstly, Lady Sarah Boyle, daughter of Richard Boyle, 1st Earl of Cork, and Catherine Fenton; this marriage produced a son, Kildare Digby (c. 1627 – 1661). Digby married secondly, Elizabeth Altham, daughter of Sir James Altham and his second wife, Mary Stapers. Digby died in 1642 and was succeeded in the barony by his son Kildare.
Digby initially wedded Lady Sarah Boyle, daughter of Richard Boyle, 1st Earl of Cork, and Catherine Fenton; this union produced a son, Kildare Digby (c. 1627 – 1661). He later married Elizabeth Altham, daughter of Sir James Altham and his second wife, Mary Stapers. Digby's life came to an end in 1642, when he was replaced by his son Kildare as the baron.