| Opacz | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Subdivision Type2: | County |
| Subdivision Name2: | Piaseczno |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Konstancin-Jeziorna |
| Pushpin Map: | Poland |
| Coordinates: | 52.1°N 31°W |
| Population Total: | 399 |
Opacz is a village in the administrative district of Gmina Konstancin-Jeziorna, within Piaseczno County, Masovian Voivodeship, in east-central Poland.[1] It lies approximately 4km (02miles) north-east of Konstancin-Jeziorna, 110NaN0 east of Piaseczno, and 180NaN0 south-east of Warsaw.