The genus name Bennettia may refer to:
- Animalia:
- Bennettia Fowler, 1904 = synonym of Lutjanus Bloch, 1790 (Perciformes, Lutjanidae)
- Bennettia Clark, 1909, junior homonym = synonym of Cenolia A.H. Clark, 1916 (Echinodermata, Comatulidae)
- Bennettia Gibson, 1981, junior homonym = synonym of Bennettiella Gibson, 1982 (Nemertea, Lineidae)