| Atalaia do Norte | |
| Settlement Type: | Municipality |
| Official Name: | The Municipality of Atalaia do Norte |
| Nickname: | "Pérola do Javari" (Javari's Pearl) |
| Mapsize: | 250px |
| Pushpin Map: | Brazil |
| Pushpin Map Size: | 250 |
| Pushpin Map Caption: | Location in Brazil |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name: |  Brazil |
| Subdivision Name1: | Norte |
| Subdivision Name2: | Amazonas |
| Leader Title: | Mayor |
| Leader Name: | Nonato do Nascimento Tenazor (PDT) |
| Established Title: | Founded |
| Established Date: | December 19, 1955 |
| Area Total Km2: | 76355 |
| Population As Of: | 2020 |
| Population Note: | [1] |
| Population Total: | 20,398 |
| Population Density Km2: | 0.17 |
| Timezone: | ACT |
| Utc Offset: | -5 |
| Coordinates: | -4.3719°N -70.1919°W |
| Elevation M: | 65 |
| Blank Name: | HDI (2000) |
| Blank Info: | 0.559 – medium[2] |
Atalaia do Norte is the most western municipality in the Brazilian state of Amazonas. As of 2020, its population was 20,398 and its area is 76,355 km2,[3] thus making it the third largest municipality in Amazonas and the seventh largest in Brazil.
The area of this municipality includes the Vale do Javari, an indigenous reserve which is inhabited until the present day by isolated Indians also called "arrow peoples", indigenous ethnic groups that have had little or no contact with modernity.[4] The town is at the start of the Itaquai River.