"The Dairymaid of Boulogne (Third Plate)" is an etching by French artist Alphonse Legros that depicts a young woman engaged in dairy work, showcasing the artist's skilled handling of line and tonal values characteristic of his printmaking practice. Legros created multiple versions of this subject, with this third plate representing his refinement of the composition through successive iterations. The work exemplifies 19th century realist interest in depicting figures from everyday working life with dignity and technical precision.