The Lost Letter or A Lost Letter may refer to:

• The Lost Letter: A Tale Told by the Sexton of the N...Church, a tale from the collection Evenings on a Farm Near Dikanka by Nikolai Gogol
• The Lost Letter (1945 film), a Soviet animated film
• The Lost Letter (1972 film), a Soviet musical-tragicomedy film
• A Lost Letter (1953 film), a Romanian historical comedy film