| CAPITAL | |
| Native Name: | Departamento Capital |
| Settlement Type: | Department |
| Coordinates: | -31.5167°N -100°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Established Title: | Established |
| Established Date: | June 13, 1562 |
| Founder: | Juan Jufré |
| Seat Type: | Seat |
| Seat: | San Juan |
| Leader Title: | Mayor |
| Leader Name: | Franco Aranda |
| Unit Pref: | Metric |
| Area Total Km2: | 30 |
| Population Total: | 116,511 |
| Population Density Km2: | auto |
| Population Demonym: | capitalino/a |
| Postal Code Type: | Postal Code |
| Postal Code: | 5400 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | SJU012 |
| Area Code Type: | Area Code |
| Area Code: | 0264 |
| Blank Name Sec1: | Patron saint |
| Blank Info Sec1: | San Juan Bautista |
Capital is a department in San Juan Province, Argentina.
The capital of San Juan has an area of . To the north bordering department Chimbas, on the east by Santa Lucía, to the west and south by Rivadavia Rawson. The approximate population of the department of capital is 118,500 inhabitants.
According to estimates from INDEC in the year 2005 it had 116,511 inhabitants.