| Official Name: | Altar |
| Pushpin Map: | Mexico Sonora#Mexico |
| Pushpin Map Caption: | Location in Mexico |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | Sonora |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Altar Municipality |
| Leader Title: | Mayor |
| Established Title: | Founded |
| Established Date: | 1775 |
| Population As Of: | 2010 |
| Population Total: | 7,927 |
| Population Blank1 Title: | Municipality |
| Population Blank2 Title: | Demonym |
| Timezone: | Pacific (US Mountain) |
| Utc Offset: | -7 |
| Timezone Dst: | No DST |
| Utc Offset Dst: | -7 |
| Coordinates: | 30.7136°N -111.8353°W |
| Elevation M: | 420 |
| Postal Code Type: | Postal code |
Altar (O'odham: Wawuk) is small city and municipal seat of Altar Municipality in the Mexican state of Sonora. It is located in the northwest region of the state at 30.7136°N -111.8353°W.
The town of Altar is situated on the important Mexicali to Hermosillo Highway (Federal Highway 2).