Beni is a department in Bolivia. The capital city is Trinidad.
The department is mainly covered by rainforest and pampa. In the region's many rivers over 400 species of fish have been found. Trinidad has an entire museum, the Museo Ictícola, dedicated to Beni's fish fauna. It is the third largest of its type in South America.
The population of the department has increased about sixfold in the past six decades:
| Year | Inhabitants | Source |
| 1950 | 71 636 | Census |
| 1976 | 168 367 | Census |
| 1992 | 276 174 | Census |
| 2001 | 362 521 | Census |
| 2012 | 421 196 | Census |
Of the 362,521 inhabitants of the Department of Beni at the time of the 2001 census, 249,152 lived in urban areas and 113,369 in rural areas. 32.75 per cent of the inhabitants over 15 years of age (27.79 per cent in urban areas and 44.65 per cent in rural areas) counted themselves as belonging to Indian peoples. According to 2001 census data, 97.41 percent of residents over 6 years of age are proficient in Spanish (99.00 percent in urban and 93.73 percent in rural areas). Spanish is the primary language for 92% of the population and Chimán for 3% (2012 census).
Beni is divided into 8 provinces:
| Province | Area | Inhabitants 2001 | Inhabitants 2005 |
| Province of Cercado | 12,276 km² | 82.653 | 92.553 |
| Province of Iténez | 36,576 km² | 18.878 | 20.086 |
| Province of Ballivián | 40,444 km² | 68.174 | 79.318 |
| Mamoré Province | 18,076 km² | 12.397 | 13.534 |
| Province of Marbán | 15,126 km² | 14.454 | 15.658 |
| Moxos Province | 33,316 km² | 21.643 | 23.608 |
| Province of Vaca Díez | 22,434 km² | 116.421 | 132.974 |
| Yacuma Province | 34,686 km² | 27.901 | 29.251 |
A: Beni Department is a region in Bolivia.
A: The capital city of Beni Department is Trinidad.
A: Beni Department is mainly covered by rainforest and pampa.
A: Over 400 species of fish have been found in the rivers of Beni Department.
A: The museum dedicated to Beni's fish fauna in Trinidad is called Museo Ictícola.
A: Museo Ictícola is the third largest of its type in South America.
A: Museo Ictícola is dedicated to showcasing and preserving Beni's fish fauna.