William Ufford, 2nd Earl of Suffolk KG (30 May 1338 – 15 February 1382) was an English nobleman in the reigns of Edward III and Richard II.

Suffolk was closely connected to Thomas Beauchamp, Earl of Warwick and John of Gaunt, Duke of Lancaster, and his conciliatory skills were highly valued in national politics.

William's father Robert, the first Ufford Earl of Suffolk, was a close associate of King Edward III and a trusted military commander in the early stages of the Hundred Years' War.

In 1324, Robert married Margaret, daughter of Walter Norwich, Treasurer of the Exchequer, expanding his already substantial territorial holdings in East Anglia.

His father campaigned in France in 1355–56 and 1359–60, and it is likely that William also took part in these expeditions,[1] along with Thomas Beauchamp, the future Earl of Warwick.

[11] Even after the council was disbanded in January 1380, he remained a central figure at court, participating in the negotiations for the king's marriage to Anne of Bohemia, and mediating in a conflict between John of Gaunt and Henry Percy, Earl of Northumberland.

The rebel leader, Geoffrey Litster, attempted to force Suffolk to join the rebellion, hoping to lend legitimacy to the cause.

[14] Much of the work suppressing the rebellion had been undertaken by Henry Despenser, Bishop of Norwich, leaving Suffolk to apprehend the remaining rebels for trial.

[1] He was buried in his family's traditional burial place Campsey Priory, an Augustinian nunnery in Campsea Ashe, Suffolk.

[1] According to the late earl's will, much of the Suffolk lands – though not the title – descended on the Willoughby family, who were connected to the Uffords through marriage.

[16] In 1385, the earldom of Suffolk was restored for Michael de la Pole, who received a great portion of Ufford's lands to support his title.