Little Eva is a fictional character in the Harriet Beecher Stowe novel Uncle Tom's Cabin. Her full name is Evangeline St. Claire.

Eva enters the narrative when Uncle Tom is traveling via steamship to New Orleans to be sold, and he rescues the 5-year-old girl from drowning. Eva encourages her father, Augustine St. Claire, to buy Tom, and he becomes the head coachman at the St. Claire plantation. He spends most of his time with the angelic Little Eva, however.

Eva constantly talks about love and forgiveness, even convincing the dour slave girl Topsy that she deserves love. She even manages to touch the heart of her sour aunt, Ophelia.

Eva soon falls ill, however, and, on her deathbed, gives a lock of her hair to each of the slaves, telling them that they must become Christians so that they may see each other in Heaven. As she dies, she convinces her father to free Tom, but circumstances intervene, and the deathbed promise never materializes.