The Neoproterozoic Era is the unit of geologic time from 1,000 to 541 million years ago.

It is the last era of the Proterozoic Eon and Precambrian Supereon; it is subdivided into the Tonian, Cryogenian, and Ediacaran Periods. It is preceded by the Mesoproterozoic era and succeeded by the Paleozoic era.