| Veinticinco de Mayo | |
| Native Name: | Departamento Veinticinco de Mayo |
| Settlement Type: | Department |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Subdivision Type1: | Province |
| Subdivision Name1: | Río Negro |
| Established Title: | Established |
| Seat Type: | Seat |
| Seat: | Maquinchao |
| Leader Title: | Mayor |
| Unit Pref: | Metric |
| Area Total Km2: | 27106 |
| Population Total: | 15743 |
| Population As Of: | 2010 |
| Population Density Km2: | auto |
| Postal Code Type: | Postal Code |
| Area Code Type: | Area Code |
Veinticinco de Mayo is a department of the province of Río Negro (Argentina).[1] [2]