Olszak, Greater Poland Voivodeship
|Coordinates: 52°19′42″N 18°40′13″E / 52.32833°N 18.67028°E|
Olszak [ˈɔlʂak] is a village in the administrative district of Gmina Babiak, within Koło County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 2 kilometres (1 mi) south of Babiak, 15 km (9 mi) north of Koło, and 120 km (75 mi) east of the regional capital Poznań.
The village has a population of 50.