| Group: | Nivaclé |
| Population: | 15,000–25,000 (2007)[1] |
| Region1: |  Paraguay |
| Pop1: | 13,700 (1991) [2] |
| Region2: |  Argentina |
| Pop2: | 878 (2022) [3] |
| Pop3: | 100 |
| Languages: | Nivaclé, Spanish |
| Religions: | Animism, Christianity |
The Nivaclé are an indigenous people of the Gran Chaco. An estimated 13,700 Nivaclé people live in the President Hayes and Boquerón Departments in Paraguay, while approximately 200 Nivaclé people live in the Salta Province of Argentina.[2] A very small number of Nivaclé live in Tarija, Bolivia. In the last 50 years, 15,000 Mennonites from Canada, Russia, and Germany have settled in traditional Nivaclé territory.[1]
They have five subgroups, which are as follows:
Nivaclé is an autonym, meaning "human."[4] They are also known as the Ashlushlay, Axluslay, Chulupí, and Nivaklé people.[2]
They speak the Nivaclé language, which has two dialects: Forest Nivaclé and River Nivaclé. Nivaclé is one of the Mataco-Guaicuru languages. A dictionary has been published for the language, and the Bible was translated into Nivaclé in 1995.[2]