Jean-Jules Allasseur (13 June 1818 — 1903) was a French sculptor, a pupil of Pierre-Jean David called David d'Angers at the École des Beaux-Arts, Paris, who produced portrait sculptures, memorial allegories and decorative architectural sculpture for official commissions under the Second Empire.
He was made a chevalier of the Legion of Honor, 7 August 1867.
He is buried at the cemetery of Montmartre (14th division) where he kept his studio.