| Official Name: | Primero de Mayo |
| Settlement Type: | Municipality and village |
| Pushpin Map: | Argentina |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Argentina |
| Subdivision Type: | Country |
| Subdivision Name: |  Argentina |
| Subdivision Name1: | Entre Ríos Province |
| Subdivision Type2: | Department |
| Unit Pref: | Imperial |
| Timezone: | ART |
| Utc Offset: | -3 |
| Coordinates: | -32.2572°N -58.4228°W |
Primero de Mayo is a village and municipality in Entre Ríos Province in north-eastern Argentina.[1]