What is the title of J.R.R. Tolkien’s story about the humble farmer who defeats a giant?

J.R.R. Tolkien’s story about a humble farmer who defeats a giant is Farmer Giles of Ham.

The comic medieval fable follows Farmer Giles, an ordinary resident of the fictional Little Kingdom. After accidentally driving away a giant, Giles becomes celebrated as a hero and is drawn into further adventures involving a dragon and a royal court. The story playfully examines reputation, courage, and the gap between public fame and private ability.

Farmer Giles of Ham is separate from Tolkien’s Middle-earth writings. It was published in 1949 with illustrations by Pauline Diana Baynes. Readers sometimes confuse it with Smith of Wootton Major, another short Tolkien work with a fairy-tale setting, but the protagonists and plots are different.