Nelsonia may refer to:
*
''Nelsonia'' (rodent), a genus of Mexican rodents in the family Cricetidae
*
''Nelsonia'' (plant), a plant genus in the family Acanthaceae
*''Nelsonia'', a synonym of ''
Abatetia'', a genus of flies in the family Dolichopodidae
*''
Paleonelsonia'', a
trilobite
Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the At ...
genus formerly known as ''Nelsonia''
*
Nelsonia, New Zealand, a geographical area covering the northern South Island of New Zealand
*
Nelsonia, Virginia, an unincorporated community in Virginia
*
3538 Nelsonia, an asteroid
{{dab, genus, geo