Darwinii, a Latin word commonly referring to English naturalist Charles Darwin (1809–1882), may refer to:

Species Amphisbaena darwinii Diplolaemus darwinii Gymnodactylus darwinii Homonota darwinii Liolaemus darwinii

Subspecies Distephanopsis crux subsp. darwinii Distephanus crux subsp. darwinii Homonota darwinii darwinii, a subspecies in the gecko species Homonota darwinii and the genus Homonota Yucca × Darwinii, a variety in the genus Yucca created by German botanist Carl Ludwig Sprenger (1846–1917)

See also Darwini (disambiguation)