| Aloja | |
| Settlement Type: | Town |
| Flag Size: | 160px |
| Pushpin Map: | Latvia |
| Pushpin Label Position: | above |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Latvia |
| Subdivision Type: | Country |
| Subdivision Name: |  Latvia |
| Subdivision Type1: | Municipality |
| Subdivision Name1: | Limbaži Municipality |
| Leader Title: | Mayor |
| Leader Name: | Valdis Bārda |
| Established Title: | Town rights |
| Established Date: | 1992 |
| Population Density Km2: | auto |
| Population Density Metro Km2: | auto |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Coordinates: | 57.7667°N 76°W |
| Elevation M: | 217 |
| Postal Code Type: | Postal code |
| Postal Code: | LV-40(64-65) |
| Blank Name: | Calling code |
| Blank Info: | 640 |
Aloja (German: Allendorf) is a town in Limbaži Municipality in the Vidzeme region of Latvia, situated close to the border with Estonia. It was within the former Limbaži District until 2009.
Aloja as a settlement was first mentioned in written sources in 1449. Aloja saw rapid development after Latvian agrarian reforms in 1920. In 1925, Aloja was granted a status of a village, and it also became a centre of the parish. In 1936, the new Rīga- Rūjiena railway line was constructed through Aloja.In 1992, Aloja was granted town rights. From 2009 until 2021, Aloja was the administrative center of the former Aloja Municipality.