''Sladenia'' is the scientific name of several genera of organisms and may refer to:
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''Sladenia'' (echinoderm) de Loriol 1909, a genus of prehistoric echinoderms in the family
Ophidiasteridae
The Ophidiasteridae (Greek ''ophidia'', Οφιδια, "of snakes", diminutive form) are a family of sea stars with about 30 genera. Occurring both in the Indo-Pacific and Atlantic Oceans, ophidiasterids are greatest in diversity in the Indo-Pacif ...
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''Sladenia'' (fish) Regan 1908, a genus of fish in the family
Lophiidae
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''Sladenia'' (plant) Kurz 1873, a genus of plants in the family
Sladeniaceae
Sladeniaceae is a family of flowering plants containing tree species found in subtropical to tropical environments in East Africa ('' Ficalhoa''), Burma, Yunnan, and Thailand ('' Sladenia''). The family consists of trees with alternate, simple l ...
{{Genus disambiguation