Eunectes beniensis is a boa species known only from the northeastern parts of Bolivia.

Eunectes beniensis is a species of boa, reaching between 3.3–4.4 meters (11–14 ft) in length and can weigh up to 35 kilograms (77 lb).

Its taxonomic status is unclear due to lack of information and the similarity in appearance to Eunectes notaeus.

The Bolivian anaconda's habitat usually consists of wetlands and other muddy, swampy or flooded areas.

In April 2022, three researchers published data on an observation of Bolivian river dolphins playing with a large (presumably deceased) E. beniensis specimen.