| Official Name: | Alto Alegre |
| Settlement Type: | Municipality |
| Pushpin Map: | Brazil |
| Pushpin Map Caption: | Location in Brazil |
| Coordinates: | 2.9878°N -61.3044°W |
| Subdivision Type: | Country |
| Subdivision Name: | Brazil |
| Subdivision Type1: | Region |
| Subdivision Name1: | North |
| Subdivision Type2: | State |
| Subdivision Name2: | Roraima |
| Subdivision Type3: | Mesoregion |
| Subdivision Type4: | Microregion |
| Subdivision Type5: | Metrop. region |
| Leader Party: | PSD |
| Leader Title: | Mayor |
| Leader Name: | Pedro Henrique Machado |
| Area Total Km2: | 25,567 |
| Population Total: | 15,380 |
| Population As Of: | 2020 [1] |
| Population Density Km2: | auto |
| Timezone1: | AMT |
| Utc Offset1: | -4 |
| Postal Code Type: | Postal code |
| Area Code Type: | Area code |
| Website: | altoalegre.rr.gov.br |
Alto Alegre (pronounced as /pt/) is a city in the Brazilian state of Roraima. The population in 2020 was 15,380, and the area is 25,567 km².[2] Its limits are Amajari to the north, Boa Vista in the east, Mucajaí and Iracema in the south, and Venezuela in the west.
Alto Alegre was founded by Pedro Costa, a gold miner. In 1982, it became an independent municipality.[3] It can be accessed from the RR-205 highway from Boa Vista.[4]
The municipality contains part of the Roraima National Forest.