| Ulcumayo | |
| Native Name: | Ullqu Mayu |
| Native Name Lang: | qu |
| Settlement Type: | District |
| Mapsize: | frameless |
| Subdivision Type: | Country |
| Subdivision Name: |  Peru |
| Subdivision Type1: | Region |
| Subdivision Name1: | Junín |
| Subdivision Type2: | Province |
| Subdivision Name2: | Junín |
| Parts Type: | Subdivisions |
| Parts Style: | para |
| Established Title: | Founded |
| Established Date: | October 26, 1926 |
| Seat Type: | Capital |
| Seat: | Ulcumayo |
| Leader Title: | Mayor |
| Leader Name: | Edson Fernando Huamali Paita |
| Unit Pref: | Metric |
| Area Total Km2: | 1002.13 |
| Elevation M: | 3600 |
| Population Total: | 8927 |
| Population As Of: | 2005 census |
| Population Density Km2: | auto |
| Timezone1: | PET |
| Utc Offset1: | -5 |
| Blank Name Sec1: | UBIGEO |
| Blank Info Sec1: | 120504 |
Ulcumayo (from local Quechua Ullqu Mayu or Ullqumayu, "male river") is one of four districts of the Junín Province in Peru.[1]
One of the highest peaks of the district is Ullqu Mayu at approximately 4800m (15,700feet). Other mountains are listed below:[2]
The Ullqu Mayu is the most important river of the district.