| Piersno | |
| Settlement Type: | Village |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Lower Silesian |
| Subdivision Type2: | County |
| Subdivision Name2: | Środa Śląska |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Kostomłoty |
| Pushpin Map: | Poland |
| Coordinates: | 51.0833°N 51°W |
| Population Total: | 500 |
Piersno is a village in the administrative district of Gmina Kostomłoty, within Środa Śląska County, Lower Silesian Voivodeship, in south-western Poland.[1] It lies approximately 5km (03miles) north-west of Kostomłoty, 80NaN0 south of Środa Śląska, and 330NaN0 west of the regional capital Wrocław.