Bartążek [barˈtɔ̃ʐɛk] is a village in the administrative district of Gmina Stawiguda, within Olsztyn County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 10 kilometres (6 mi) north-east of Stawiguda and 8 km (5 mi) south of the regional capital Olsztyn. It is located in Warmia.

In Bartążek there is a historic park, dating back to the 18th century.

Before 1772 the area was part of Kingdom of Poland, in 1772–1871 of Prussia, in 1871–1945 of Germany, and again of Poland since 1945.