| Olsza | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Kuyavian-Pomeranian |
| Subdivision Type2: | County |
| Subdivision Name2: | Mogilno |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Mogilno |
| Pushpin Map: | Poland |
| Coordinates: | 52.6333°N 18°W |
Olsza is a village in the administrative district of Gmina Mogilno, within Mogilno County, Kuyavian-Pomeranian Voivodeship, in north-central Poland.[1] It lies approximately 4km (02miles) south-east of Mogilno, 540NaN0 south of Bydgoszcz, and 610NaN0 south-west of Toruń.