Robert Welles, 8th Baron Willoughby de Eresby and Baron Welles (died March 19, 1470), is the son of Richard Welles, 7th Baron Welles, and Joan Willoughby, 7th Baroness Willoughby de Eresby.

He is the prime mover in an uprising against Edward IV in 1470, although his actions are possibly orchestrated by Richard Neville, 16th Earl of Warwick.