| Ariquemes | |
| Settlement Type: | Municipality |
| Official Name: | The Municipality of Ariquemes |
| Mapsize: | 250px |
| Pushpin Map: | Brazil |
| Pushpin Map Caption: | Location of Ariquemes |
| Subdivision Type: | Country |
| Subdivision Name: |  Brazil |
| Subdivision Name1: | North |
| Subdivision Name2: | Rondônia |
| Leader Title: | Mayor |
| Leader Name: | Thiago Leite Flores Pereira (PMDB) |
| Established Title: | Founded |
| Established Date: | November 21, 1977 |
| Area Total Km2: | 4427 |
| Population As Of: | 2020 [1] |
| Population Total: | 109,523 |
| Population Density Km2: | auto |
| Timezone: | AMT |
| Utc Offset: | -4 |
| Coordinates: | -9.9161°N -63.0408°W |
| Elevation M: | 142 |
| Blank Name: | HDI (2000) |
| Blank Info: | 0.752 – medium[2] |
| Website: | www.ariquemes.ro.gov.br |
Ariquemes is a municipality located in the Brazilian state of Rondônia. Its population was 109,523 (2020 est.) and its area is 4,427 km2.[3] It is the third-largest city in Rondônia state.
The city is served by Ariquemes Airport.