| Arma | |
| Native Name Lang: | es |
| Settlement Type: | District |
| Mapsize: | frameless |
| Subdivision Type: | Country |
| Subdivision Name: |  Peru |
| Subdivision Type1: | Region |
| Subdivision Name1: | Huancavelica |
| Subdivision Type2: | Province |
| Subdivision Name2: | Castrovirreyna |
| Parts Type: | Subdivisions |
| Parts Style: | para |
| Established Title: | Founded |
| Seat Type: | Capital |
| Seat: | Arma |
| Leader Title: | Mayor |
| Unit Pref: | Metric |
| Area Total Km2: | 304.85 |
| Elevation M: | 3336 |
| Population Total: | 1596 |
| Population As Of: | 2005 census |
| Population Density Km2: | auto |
| Timezone1: | PET |
| Utc Offset1: | -5 |
| Blank Name Sec1: | UBIGEO |
| Blank Info Sec1: | 090402 |
Arma District is one of thirteen districts of the Castrovirreyna Province in Peru.[1]