| Official Name: | Ralja |
| Native Name: | Раља |
| Settlement Type: | Village (Selo) |
| Pushpin Map: | Serbia |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: |  Serbia |
| Subdivision Type1: | District |
| Subdivision Name1: | Podunavlje District |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Smederevo |
| Unit Pref: | Imperial |
| Population As Of: | 2022 |
| Population Total: | 1,114 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 44.5928°N 20.9703°W |
Ralja is a village in the municipality of Smederevo, Serbia. According to the 2022 census, the village has a population of 1,322 people.
Ralja is near Zelezara (ex USStell) which is one of biggest factories in Serbia. Ralja is also a football team with football stadium with capacity of 1000 seats.