Prince Henri Florent Eugène François Joseph Lamoral de Ligne (29 December 1881 – 15 May 1967) was a Belgian nobleman, the son of Prince Charles Joseph Eugène Henri Georges Lamoral (1837–1914) (himself the son of Prince Eugène, 8th Prince of Ligne and his wife Nathalie de Trazegnies) and Charlotte de Gontaut-Biron (1854–1933), (herself the daughter of Étienne Charles de Gontaut, Marquis of Biron).