| Motto: | Machadinho d'Oeste a cidade que cresce! |
| Coordinates: | -9.4253°N -61.9975°W |
| Subdivision Type: | Country |
| Subdivision Name: | Brazil |
| Subdivision Type1: | State |
| Subdivision Name1: | Rondonia |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Machadinho d'Oeste |
| Established Date: | 11/05/1988 |
| Leader Party: | PV |
| Leader Title: | Prefect |
| Leader Name: | Mario Alves |
| Unit Pref: | Metric |
| Area Total Km2: | 8509.274 |
| Population Total: | 40,867 |
| Population As Of: | 2020 [1] |
| Population Density Km2: | auto |
| Population Demonym: | machadinhense-d'oeste |
| Timezone1: | AMT |
| Utc Offset1: | -4 |
Machadinho d'Oeste is a municipality located in the Brazilian state of Rondônia. Its population was 40,867 (2020) and its area is 8,509 km².[2]
The municipality contains part of the Jaru Biological Reserve, a fully protected conservation unit created in 1984.It also contains 13% of the Campos Amazônicos National Park, a protected area created in 2006 that protects an unusual enclave of cerrado vegetation in the Amazon rainforest.
The municipality contains 78% of the Angelim Extractive Reserve and 79% of the Ipê Extractive Reserve.It also contains the Castanheira, Freijó, Garrote, Itaúba, Jatobá, Maracatiara, Massaranduba, Mogno, Piquiá, Roxinho and Sucupira extractive reserves.