| Iglesia | |
| Native Name: | Departamento Iglesia |
| Settlement Type: | Department |
| Coordinates: | -30.1833°N -78°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Established Title: | Established |
| Established Date: | November 15, 1851 |
| Seat Type: | Seat |
| Seat: | Rodeo |
| Leader Title: | Mayor |
| Unit Pref: | Metric |
| Area Total Km2: | 19801 |
| Population Total: | 6737 |
| Population Density Km2: | auto |
| Population Demonym: | iglesiano/a |
| Postal Code Type: | Postal Code |
| Postal Code: | 5400 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | SJU006 |
| Area Code Type: | Area Code |
| Area Code: | 0264 |
Iglesia is a department of the province of San Juan, Argentina. It is located in the northwest mountainous corner of this province with substantial vegetation. Iglesia is one of the most visited departments in the province, particularly around Rodeo.
Nearly 30 percent of the cultivated area is dedicated to logging. Next in land area are pasture and seeds (garlic, beans, lettuce, onions, peas). Fruit, cereals, vegetables and aromatics are minor crops. Local farmers breed goats and sheep on the grassland.
Significant gold and silver mining occupy the Cordillera iglesiana, including the Veladero mine, which began production in 2005. Located 375 kilometers from the city of San Juan, the project is run by Minera Argentina Gold (MAGSA), a subsidiary of Barrick Gold.