The Cornfield is an oil painting by the English artist John Constable, completed from January to March 1826 in the artist’s studio. The painting shows a lane leading from East Bergholt toward Dedham, Essex, and depicts a young shepherd boy drinking from a pool in the heat of summer. The location is along Fen Lane, which the artist knew well. Constable referred to the piece as The Drinking Boy.

John Constable was an English landscape painter in the Romantic tradition. Born in Suffolk, he is known principally for revolutionising the genre of landscape painting with his pictures of Dedham Vale, the area surrounding his home – now known as "Constable Country" – which he invested with an intensity of affection. "I should paint my own places best", he wrote to his friend John Fisher in 1821, "painting is but another word for feeling".